Gitlab was really promising for my colleagues and I, but its inability to host git repos on the url root (aka gitrepo.mycompany.com/product.git) without hacking means its a no-go as we're not particularly inclined to redo all our development, deployment, and testing infrastructure. We use git a lot in our organization, including customer-facing stuff, so it would be a large transition.

Also stubborn coworkers who don't want to monkey with git settings.

Which is a shame, I really like gitlab and would love to replace gitolite :/