diff --git a/sendgrid/helpers/stats/stats.py b/sendgrid/helpers/stats/stats.py
index 8fe1399a2..b866093b5 100644
--- a/sendgrid/helpers/stats/stats.py
+++ b/sendgrid/helpers/stats/stats.py
@@ -1,6 +1,14 @@
 class Stats(object):
+    """
+    Object for building query params for a global email statistics request
+    """
     def __init__(
             self, start_date=None):
+        """Create a Stats object
+
+        :param start_date: Date of when stats should begin in YYYY-MM-DD format, defaults to None
+        :type start_date: string, optional
+        """
         self._start_date = None
         self._end_date = None
         self._aggregated_by = None
@@ -14,11 +22,18 @@ def __init__(
             self.start_date = start_date
 
     def __str__(self):
+        """Get a JSON representation of this object.
+
+        :rtype: string
+        """
         return str(self.get())
 
     def get(self):
         """
-        :return: response stats dict
+        Get a JSON-ready representation of Stats
+
+        :returns: This GlobalStats, ready for use in a request body.
+        :rtype: response stats dict
         """
         stats = {}
         if self.start_date is not None:
@@ -39,63 +54,136 @@ def get(self):
 
     @property
     def start_date(self):
+        """Date of when stats should begin in YYYY-MM-DD format
+
+        :rtype: string
+        """        
         return self._start_date
 
     @start_date.setter
     def start_date(self, value):
+        """Date of when stats should begin in YYYY-MM-DD format
+
+        :param value: Date representing when stats should begin
+        :type value: string
+        """
         self._start_date = value
 
     @property
     def end_date(self):
+        """Date of when stats should end in YYYY-MM-DD format
+
+        :rtype: string
+        """  
         return self._end_date
 
     @end_date.setter
     def end_date(self, value):
+        """Date of when stats should end in YYYY-MM-DD format
+
+        :param value: Date representing when stats should end
+        :type value: string
+        """
         self._end_date = value
 
     @property
     def aggregated_by(self):
+        """Chosen period (e.g. 'day', 'week', 'month') for how stats get grouped
+
+        :rtype: string
+        """        
         return self._aggregated_by
 
     @aggregated_by.setter
     def aggregated_by(self, value):
+        """Chosen period (e.g. 'day', 'week', 'month') for how stats get grouped
+
+        :param value: Period for how keys will get formatted
+        :type value: string
+        """        
         self._aggregated_by = value
 
     @property
     def sort_by_metric(self):
+        """Metric to sort stats by
+
+        :rtype: string
+        """        
         return self._sort_by_metric
 
     @sort_by_metric.setter
     def sort_by_metric(self, value):
+        """Metric to sort stats by
+
+        :param value: Chosen metric stats will by sorted by
+        :type value: string
+        """        
         self._sort_by_metric = value
 
     @property
     def sort_by_direction(self):
+        """Direction data will be sorted, either 'asc' or 'desc'
+
+        :rtype: string
+        """        
         return self._sort_by_direction
 
     @sort_by_direction.setter
     def sort_by_direction(self, value):
+        """Direction data will be sorted, either 'asc' or 'desc'
+
+        :param value: Direction of data, either 'asc' or 'desc'
+        :type value: string
+        """        
         self._sort_by_direction = value
 
     @property
     def limit(self):
+        """Max amount of results to be returned
+
+        :rtype: int
+        """        
         return self._limit
 
     @limit.setter
     def limit(self, value):
+        """Max amount of results to be returned
+
+        :param value: Max amount of results
+        :type value: int
+        """        
         self._limit = value
 
     @property
     def offset(self):
+        """Number of places a starting point of a data set will move
+
+        :rtype: int
+        """        
         return self._offset
 
     @offset.setter
     def offset(self, value):
+        """Number of places a starting point of a data set will move
+
+        :param value: Number of positions to move from starting point
+        :type value: int
+        """        
         self._offset = value
 
 
 class CategoryStats(Stats):
+    """
+    object for building query params for a category statistics request
+    """
     def __init__(self, start_date=None, categories=None):
+        """Create a CategoryStats object
+
+        :param start_date: Date of when stats should begin in YYYY-MM-DD format, defaults to None
+        :type start_date: string, optional
+        :param categories: list of categories to get results of, defaults to None
+        :type categories: list(string), optional
+        """        
         self._categories = None
         super(CategoryStats, self).__init__()
 
@@ -107,7 +195,9 @@ def __init__(self, start_date=None, categories=None):
 
     def get(self):
         """
-        :return: response stats dict
+        Get a JSON-ready representation of this CategoryStats.
+
+        :return: response category stats dict
         """
         stats = {}
         if self.start_date is not None:
@@ -131,16 +221,35 @@ def get(self):
 
     @property
     def categories(self):
+        """List of categories
+
+        :rtype: list(Category)
+        """        
         return self._categories
 
     def add_category(self, category):
+        """Appends a category to this object's category list
+
+        :param category: Category to append to CategoryStats
+        :type category: Category
+        """
         if self._categories is None:
             self._categories = []
         self._categories.append(category)
 
 
 class SubuserStats(Stats):
+    """
+    object of building query params for a subuser statistics request
+    """    
     def __init__(self, start_date=None, subusers=None):
+        """Create a SubuserStats object
+
+        :param start_date: Date of when stats should begin in YYYY-MM-DD format, defaults to None
+        :type start_date: string, optional
+        :param subusers: list of subusers to get results of, defaults to None
+        :type subusers: list(string), optional
+        """        
         self._subusers = None
         super(SubuserStats, self).__init__()
 
@@ -152,7 +261,9 @@ def __init__(self, start_date=None, subusers=None):
 
     def get(self):
         """
-        :return: response stats dict
+        Get a JSON-ready representation of this SubuserStats.
+
+        :return: response subuser stats dict
         """
         stats = {}
         if self.start_date is not None:
@@ -176,47 +287,98 @@ def get(self):
 
     @property
     def subusers(self):
+        """List of subusers
+
+        :rtype: list(Subuser)
+        """
         return self._subusers
 
     def add_subuser(self, subuser):
+        """Appends a subuser to this object's subuser list
+
+        :param subuser: Subuser to append to SubuserStats
+        :type subuser: Subuser
+        """
         if self._subusers is None:
             self._subusers = []
         self._subusers.append(subuser)
 
 
 class Category(object):
-
+    """
+    Represents a searchable statistics category to be used in a CategoryStats object
+    """
     def __init__(self, name=None):
+        """Create a Category object
+
+        :param name: name of category, defaults to None
+        :type name: string, optional
+        """        
         self._name = None
         if name is not None:
             self._name = name
 
     @property
     def name(self):
+        """Get name of category
+
+        :rtype: string
+        """
         return self._name
 
     @name.setter
     def name(self, value):
+        """Set name of category
+
+        :param value: name of the statistical category
+        :type value: string
+        """        
         self._name = value
 
     def get(self):
+        """
+        Get a string representation of Category.
+
+        :return: string of the category's name
+        """
         return self.name
 
 
 class Subuser(object):
-
+    """
+    Represents a searchable subuser to be used in a SubuserStats object
+    """    
     def __init__(self, name=None):
+        """Create a Subuser object
+
+        :param name: name of subuser, defaults to None
+        :type name: string, optional
+        """        
         self._name = None
         if name is not None:
             self._name = name
 
     @property
     def name(self):
+        """Get name of the subuser
+
+        :rtype: string
+        """        
         return self._name
 
     @name.setter
     def name(self, value):
+        """Set name of the subuser
+
+        :param value: name of the subuser
+        :type value: string
+        """        
         self._name = value
 
     def get(self):
+        """
+        Get a string representation of Subuser.
+
+        :return: string of the subuser's name
+        """
         return self.name