It's really slow and unstable. It's also constantly trying to push different messages into my face that I don't care about nor can I switch off those messages (Autodevops for example). Some of the ui tooltips constantly block the links I want to click on, search it REALLY slow and almost useless. This is the paid gitlab.com SaaS.
Also after reading one of their postmortems about an incident where someone deleted a production DB, it just did not inspire confidence.
Also they have taken a ton of VC money, not sure how long the "not Microsoft" argument is going to stand.
Current client is on GitHub and the experience is definitely much better. Not happy about their MS ties and tech-bro misogyny problems. Hopeful for sourcehut tho.