This was my first time at Berlin Expert Days. This conference is organized by the community for the community over two days. The venue is pretty cool with a modern exterior and slightly older interior and well sized for the conference. The first dad had four parallel tracks, while the second had two.
I presented A Journey of Contribution and Collaboration in Open Source in the afternoon on the first day. Since the presentation does not have any demos to lean back on, it is kind of a different experience for me. The audience were engaged, and we had some good questions and discussions after the talk.
If you ever visit Berlin, you should make sure to go for a run, or a walk if that is your cup of tea, in Tiergarten. I went for a morning run before the conference both days. The second day I ended up running 11 km. The weather sunny and the temperature perfect for running.