Docker is solving so many problems, it had to be good... and it is. Easy to handle, easy to setup, easy to run (Especially with the new Docker for Mac). We will never go back to Vagrant or anything else.
We are currently rebuilding Pagelanes completly dockerized. It has never been more fun. All developers share the machines, everybody has the same enviroment, even in Production the machines run the same (AWS ECS).
So, an absolute thumbs up from me.