Even though we didn't leave the harbor, it was a great experience. We spent a lovely evening having BBQ while the waves were gently rocking the boat. I can definitively recommend it to everyone as a great way of staying in Berlin with public transportation around the corner if you're looking for a different experience than the usual apartment.
Onboarding was very flexible with the host providing an instructive video after I had trouble being at the boat during the​ given onboarding timeframe.