Hands-down one of the best AirBnB experiences so far that I had - and I had many:
the rooms are very clean and modern, there's everything you need + they really care for details. There were even free drinks when I checked in :)
I'd go so far and compare this to an above-average hotel, just a lot more affordable!
The check-in was super easy, and the different guides made it pretty pretty simple. The communication via WhatsApp was flawless.
I will certainly come back, whenever I need to stay in Berlin!