We'd used GitLab for over a year internally, but as I've mentioned previously, it became a pain to maintain. So we switched to GitHub for our private "important" projects and turned off our GitLab instance (other reasons caused this too mind). Our version was 6.7 or something up until today.
Today we realised we should run GitLab internally again for non-critical repositories - since our networking is a pain to give external access to servers - we can't access it out of the office. I updated us to 7.12 CE and I kind of regret it.
The UI is so complicated now. Whilst there are good features that we like, it's so hard to navigate to where you want to be. I think this is down to the "contextual" sidebar. I really do prefer GitHub's UI for repo administration and usage, which is a shame.
Sure, the colours are nice in GitLab but it's far from functional. My colleagues felt the same way too.
Also (for those at GitLab) your Markdown renderer is still not rendering Markdown correctly in all cases...
Anyway, not to take away from the funding - it's excellent news!