It's basically Ubuntu LTS without all the buggy slow crap like unity.
Re Ubuntu, it helps that it works exceptionally well on anything remotely modern (6 year old PC here with SSD, won't be upgrading until it dies), and it is getting incrementally better with each release.
Whatever the haters have against it, in the end I get stuff done faster and spend less time configuring my DE.
It has some critical flaws, but it's manageable. (The worst being poor workspaces support)
I use Xubuntu and it's pretty good - Ubuntu without the dumbed-down Unity stuff.
I added it to my dotfiles repo and it's been working perfectly. Not only for installing on a new machine, but for syncing changes across computers as well. I install some new software on my laptop, I add it to my provisioning file and commit one or two of its dotfiles, and, when I move to the desktop, its entire state is one "git pull; provision" away.
I have no idea why I haven't done this earlier. Here's the playbook, if you're curious: