Our biggest customer installation had a serious problem in 2015 and we addressed it. We have customers switching from GHE because of the reliability of GitLab self hosted. There are problems on GitLab.com, we made solving that harder because we insist on running the same code our customers are running, so we'll never have a repeat of 2015.
We would love to get in touch to discuss any performance problems you're still having.
If that's the name of your employer, bear in mind that you can get into massive hot water for using it to endorse third-party products without authorization.
I was trying to say that, in my experience, Gitlab has become the defacto VCS tool for new/small companies that want something self-hosted.
What's interesting is, I do see the trend slightly change the last year, as Gitlab becomes heavier and people switching to gogs.
In the end there is probably enough space for all depending on your needs.