[Chromozon]

TFS is great if everything in your codebase is a Visual Studio project. If you are trying to use it for other things, there are better version control systems out there.

My ranking is Perforce > Git > TFS > SVN. I haven't used Mercurial. I like Perforce the best because of its clean UI, its explicit checkout mechanism (all files are read-only by default, and you have to check out anything before you can edit), the integration tool GUI, and the ability to cloud-save work without submitting it. TFS is nice because it has built-in code review, but the UI isn't nearly as clean as Perforce.