I've used GAE on some projects in the recent past, and am working on the use of AppScale for a few purposes:
1. Remove infrastructure lock-in
2. Portability
3. Support for hybrid cloud
I like the concept of a GAE/Appscale platform implementation for my teams, as it allows them to focus on our core value, instead of implementing the well-known use cases. With the addition of being able to stand it up on any cloud infrastructure end-point is phenomenal.
