I haven't used either approach, but how does using this project compare to just using NDB directly with the Django middleware?
https://cloud.google.com/appengine/docs/python/ndb/#integrat...
https://cloud.google.com/appengine/docs/python/ndb/#integrat...
The Django NDB middleware written by Google, as far as I can work out, just makes sure that writes are flushed. You still have to define and query your models using NDB syntax.