I must say, this is one of the easiest workflows that I've experienced.
However, I cannot use it because the IO is a huge bottleneck (as it is with FloydHub; @sai, @narenst - you know this, I'm sure).
If you can somehow eliminate it, this has the potential to be the go to solution for cloud-based deep learning.
P.S. Keep us updated. We're rooting for you.