Anyone have any insight to using a tool like this over pymongo directly? I find that the nicest thing about mongodb is how flexible it is, and any other type of caching is easily done with redis on the side.
Yes me, we use it to formalise documents and explicitly declare what data we store.
For total flexibility dictionary fields are best, they will handle any complex type eg: embedded dictionaries, lists or even other documents (automatically converting to a DBRef), however, you dont get validation, which may or may not be an issue based on your circumstances.
