The thing i like most about Drie, it's ability to scale horizontally without any issues at all! I mean if you are using docker containers then its just perfect for scaling up or down with in seconds which was my requirement actually :) And no need of having dedicated servers! It will take care off everything including security etc so this one surely gonna work best outta them all compared other PaaS providers!! Nothing much really liked only few things but still they can improve upon their UI/UX also considering more features than what we asked from beginning should be added by now :).
If anyone wants an easy way forward regarding Docker containerization solution look here - Drieware (driewirer) provides very good support not limited too specific technologies only supports aws cloud environment though. You don't have worry related towards server side development since our entire app logic would reside within.