For us, the biggest problem is that Vagrant, on Windows machines, doesn't run well on Hyper-V (it has network limitations e.g. you can't force a static IP for the machine).

So we have to keep using VirtualBox which is slower.

Another consequence of this is that in order to use VirtualBox you need to completely disable Hyper-V, so on Windows machines our devs are forced to use Docker Toolbox (instead of Docker for Windows which is faster but based on Hyper-V).

(Note: we are a small team with little experience both in Docker and Vagrant so we welcome suggestions: if you thing we're doing something wrong please leave a comment).