I finally attended my first DevOpsDays in Kiel. I cannot compare to other events in the DevOpsDays series, but in any case it was a wonderful small one-track IT conference. One with the cosy atmosphere because with less than 200 attendees you can talk to everyone. We had two great days with a beautiful venue on the science campus, good catering, several sponsors, competent speakers, and last but not least a professional and dedicated organizing team.
One interesting observation: DevOps certainly has become mainstream already; because even IBM tells us how to do it.