GitLab CI is, for us, configurable in ways that CircleCI and Travis are not, by a long shot (but they both have other features that gitlab doesn't have, it's just that we don't need them)

I sure miss CircleCI step folding in the log output though.

this, step folding is definitely missing in gitlab-ci compare to travis, especially as it seems most CI product have it and (I think) it something that only require frontend developement ?

Thanks for the feedback. Here's an issue to track the request: https://gitlab.com/gitlab-org/gitlab-ce/issues/14664 and I added it to our Missing features section with https://gitlab.com/gitlab-com/www-gitlab-com/commit/ddfc9ee1....

I know you said you don't need them, but what features are we missing?

GitLab CI works really well, haven't looked back at Jenkins since I swapped

Agreed. Love it.

Same here! We love GitLab CI

I actually really like gitlab CI because it is incredibly simple and easy to get started. I'm sure if we had a more complicated CI flow we would benefit from Jenkins, but it's 1 less tool to manage. Also, IIRC, when it first came out, Jenkins didn't allow you to store the CI config in a repo file, which I much prefer.