diff --git a/src/dabmodel/base_element.py b/src/dabmodel/base_element.py
index 9610ac7..7de3efa 100644
--- a/src/dabmodel/base_element.py
+++ b/src/dabmodel/base_element.py
@@ -13,34 +13,26 @@ class BaseElement:
 
     def __setattr__(self, key: str, value: Any):
         print(f"!guarded_setattr {self} {key} {value}")
-        print(f"__lam_object_mutable__ = {self.__lam_object_mutable__}")
-        print(self.__lam_schema__)
+
         if key.startswith("_"):
-            print(f"hola: {self} ")
             return super().__setattr__(key, value)
 
-        if key in self.__lam_schema__.keys():
-            if key in self.__dict__ and is_data_attribute(key, self.__dict__[key]):
-                print(f"a: {self.__lam_object_mutable__}")
-                if not self.__lam_object_mutable__:
-                    print("RAISE")
-                    raise ReadOnlyField(f"{key} is read-only")
-                else:
-                    print("TYPE CHECK")
-                    try:
-                        check_type(
-                            value,
-                            self.__lam_schema__[key].annotations,
-                            collection_check_strategy=CollectionCheckStrategy.ALL_ITEMS,
-                        )
-                    except TypeCheckError as exp:
-                        raise InvalidFieldValue(
-                            f"Value of Field <{key}> is not of expected type {self.__lam_schema__[key].annotations}."
-                        ) from exp
-                    return super().__setattr__(key, value)
-        else:
-            raise NewFieldForbidden("creating new fields is not allowed")
+        if key not in self.__lam_schema__.keys():
+            raise NewFieldForbidden(f"Can't create new object attributes: {key}")
 
+        if not self.__lam_object_mutable__:
+            raise ReadOnlyField(f"{key} is read-only")
+
+        try:
+            check_type(
+                value,
+                self.__lam_schema__[key].annotations,
+                collection_check_strategy=CollectionCheckStrategy.ALL_ITEMS,
+            )
+        except TypeCheckError as exp:
+            raise InvalidFieldValue(
+                f"Value of Field <{key}> is not of expected type {self.__lam_schema__[key].annotations}."
+            ) from exp
         return super().__setattr__(key, value)
 
     def freeze(self, force: bool = False):
@@ -110,5 +102,5 @@ class BaseElement:
         raise SchemaViolation(f"Attribute <{name}> is missing from instance")
 
     @classmethod
-    def freeze_class(cls):
+    def freeze_class(cls, force: bool = False):
         pass
diff --git a/src/dabmodel/exception.py b/src/dabmodel/exception.py
index 0a28288..ebf43d0 100644
--- a/src/dabmodel/exception.py
+++ b/src/dabmodel/exception.py
@@ -85,6 +85,12 @@ class InvalidFieldValue(DABModelException):
     """
 
 
+class InvalidFieldName(DABModelException):
+    """InvalidFieldName Exception class
+    The Field name is invalid
+    """
+
+
 class NonExistingField(DABModelException):
     """NonExistingField Exception class
     The given Field is non existing
diff --git a/src/dabmodel/meta/appliance.py b/src/dabmodel/meta/appliance.py
index a8c1ef3..0fe3e51 100644
--- a/src/dabmodel/meta/appliance.py
+++ b/src/dabmodel/meta/appliance.py
@@ -7,10 +7,8 @@ from ..LAMFields.LAMField import LAMField
 from ..LAMFields.FrozenLAMField import FrozenLAMField
 from .element import _MetaElement
 from ..feature import Feature
-from ..exception import (
-    InvalidFieldValue,
-    InvalidFeatureInheritance,
-)
+from ..exception import InvalidFieldValue, InvalidFeatureInheritance, InvalidFieldName
+from ..tools import LAMdeepfreeze
 
 
 class _MetaAppliance(_MetaElement):
@@ -88,6 +86,8 @@ class _MetaAppliance(_MetaElement):
         """
         print(f"(appliance) process_new_field: {_fname}")
         print(namespace["__lam_schema__"]["features"].keys())
+        if _fname == "feature":
+            raise InvalidFieldName("'feature' is a reserved Field name")
         if _fname in namespace["__lam_schema__"]["features"].keys():
             print("??a")
             if not issubclass(_fvalue, namespace["__lam_schema__"]["features"][_fname]):
@@ -161,8 +161,8 @@ class _MetaAppliance(_MetaElement):
                             f"Invalid value for {fname}.{field_name}: "
                             f"expected {field.annotations}, got {new_val!r}"
                         ) from exp
-                    # object.__setattr__(inst, field_name, LAMdeepfreeze(new_val))
-                    object.__setattr__(inst, field_name, new_val)
+                    object.__setattr__(inst, field_name, LAMdeepfreeze(new_val))
+                    # object.__setattr__(inst, field_name, new_val)
                     inst.__lam_schema__[field_name] = FrozenLAMField(
                         LAMField(field_name, new_val, field.annotations, field._info)
                     )
diff --git a/src/dabmodel/meta/element.py b/src/dabmodel/meta/element.py
index 6b44ae0..dfaac56 100644
--- a/src/dabmodel/meta/element.py
+++ b/src/dabmodel/meta/element.py
@@ -524,6 +524,8 @@ class _MetaElement(type):
         mcs.commit_fields(_cls, name, bases, namespace, extensions)
         mcs.apply_initializer(_cls, name, bases, namespace, extensions)
         mcs.finalize_class(_cls, name, bases, namespace, extensions)
+        if not _cls.__lam_class_mutable__:
+            _cls.freeze_class(True)
         _cls.__lam_initialized__ = True
         return _cls
 
@@ -678,7 +680,11 @@ class _MetaElement(type):
                 return super().__getattr__(name)
                 # return cls.__dict__[name]
             if name in cls.__lam_schema__.keys():
-                return cls.__lam_schema__[name].raw_value
+                if cls.__lam_class_mutable__:
+                    print("HEy hey WHYYYYYY")
+                    return cls.__lam_schema__[name].raw_value
+                else:
+                    return cls.__lam_schema__[name].value
             else:
                 raise NonExistingField("Non existing class attribute")
                 # return super().__getattr__(name)