diff --git a/vaep/sklearn/ae_transformer.py b/vaep/sklearn/ae_transformer.py
index c77d9ab38..a64af1a31 100644
--- a/vaep/sklearn/ae_transformer.py
+++ b/vaep/sklearn/ae_transformer.py
@@ -36,9 +36,10 @@ class AETransformer(TransformerMixin, BaseEstimator):
     """Autoencoder transformer (Denoising or Variational).
 
     Autoencoder transformer which can be used to impute missing values
-    in a dataset it is fitted to. Currently the data is standard normalized
-    for fitting the model, but imputations are provided the original scale
+    in a dataset it is fitted to. The data is standard normalized
+    for fitting the model, but imputations are provided on the original scale
     after internally fitting the model.
+
     The data uses the wide data format with samples as rows and features as columns.
 
 
diff --git a/vaep/sklearn/cf_transformer.py b/vaep/sklearn/cf_transformer.py
index 36e0334f3..1ffca9a6c 100644
--- a/vaep/sklearn/cf_transformer.py
+++ b/vaep/sklearn/cf_transformer.py
@@ -36,6 +36,8 @@ class CollaborativeFilteringTransformer(TransformerMixin, BaseEstimator):
     three columns. The sample and feature identifiers are embedded into a space which is
     then used to predict the quantitative value.
 
+    The data is expected as a Series with a MultiIndex of the sample and feature identifiers,
+    and the quantitative value as its values.
 
     Parameters
     ----------
@@ -78,15 +80,17 @@ def fit(self, X: pd.Series, y: pd.Series = None,
 
         Parameters
         ----------
-        X : Series, shape (n_samples, )
-            The training data as a Series with the target_column as entries and name,
-            which has the item_column and sample_column set in a MultiIndex.
-            Is of shape (n_samples, )
+        X : Series, shape (n_values, )
+            The training data as a Series with the target_column as it values
+            and target_column as its name. The Series has a MultiIndex defined by the
+            item_column and sample_column.
+            Is of shape (n_values, )
 
         y : Series, optional
-            The validation data as a Series with the target_column as entries and name,
-            which has the item_column and sample_column set in a MultiIndex.
-            Is of shape (n_samples, ), by default None
+            The validation data as a Series with the target_column as it values
+            and target_column as its name. The Series has a MultiIndex defined by the
+            item_column and sample_column.
+            Is of shape (n_values, ), by default None
 
         epochs_max : int, optional
             Maximal number of epochs to train, by default 100