I keep a Vagrant box in parallel with nearly every server I manage, as a staging/testing instance where I can check new configuration. In this capacity it's great, though I find it a little heavyweight for use as a dev environment for individual applications. Since people are making disparaging comments comparisons to Docker, I'll comment that for me they serve two different purposes: I use Vagrant for managing server configuration, and Docker for managing isolated applications, many of which may be running on a given server. For low-friction development, nothing beats running the stuff locally, but for languages/environments I don't use frequently and deployment, Docker+Vagrant are perfect.

Also, I build a Debian repository at https://vagrant-deb.linestarve.com which serves the .deb files so you don't have to update them manually whenever a new version of Vagrant is released.