Yes really a great platform. I use it from the beginning. I asked because a resizing server is RAM hungry and on Heroku large dynos are quite pricey, perhaps a standard VPS can let you save a bit.
Which resizing/cdn did you installed?
Discussion
Edge. I thought about doing it on AWS but I can't spent too much time keeping servers alive :(
Either way, this use is just for APK installers. Imagine when it hits the play store.