Vagrant is great if you want to share VMs with co-workers. If you're using Windows and I'm using OSX and we're working on the same project that will be deployed

Vagrant is great if you want to share VMs with co-workers. If you're using Windows and I'm using OSX and we're working on the same project that will be deployed to an Ubuntu machine, we can each `vagrant up` our own virtual machine and they will be exactly the same. Puppet or Chef provisioning of that vagrant VM will be very similar to using fabric to fully configure everything, with the added nicety that there are a tonne of puppet and chef configs that can be reused (not so much with fabric I've found). So vagrant doesn't give you anything you don't already have if you're just configuring a VM, except maybe the networking and shared folders. But being able to share that VM, destroy it, and rebuild it is where vagrant makes a lot of sense.