Seems like a great product to quickly get started with a mBaaS in a powerful cloud like AWS. The concept looks really similar to StrongLoop's loopback [0] with a big difference: vendor lock-in. I like the openness that StrongLoop is bringing on this front... IMO the best solution is one that allows you to move your containerised API from cloud to another cloud.
That being said, having this as an option in AWS is pretty cool and potentially time-saving. I'll probably give it a shot soon.