GitLab CI has been hard to use for a long time since we didn't devote a lot of time to it (less than 1 person). But we saw it got traction nonetheless and opted

GitLab CI has been hard to use for a long time since we didn't devote a lot of time to it (less than 1 person). But we saw it got traction nonetheless and opted to integrate it in the main GitLab application in 8.0. Since then it's popularity is growing fast, we added a lot of features (most recently build artifacts) and we have more than 2 people working on it full time.