I’ve been using it for a little while now, I’m enjoying it. It’ll definitely lower the barrier to entry for others to use Git. Rarely it’ll do something stupid, so I have to open powershell, but for the most part I really like it.
I actually use it with Bitbucket repositories as well… used this guide: http://haacked.com/archive/2012/05/30/using-github-for-windows-with-non-github-repositories.aspx