Tim's place was really great! We stayed for a week and spent part of the time working and part of the time exploring. It was a very bright, spacious, and artfully decorated space which made it a pleasant place to spend down time (the TV setup is awesome!) and then it was very conveniently located to public transit that took only about 20-30 mins to get to most major attractions.
Tim had all the basics stocked and we were able to get anything else that we needed quickly because we were in very close proximity to restaurants, cafes, ATMs, and grocery stores.
We also slept very well - the bed was comfortable and the room had blackout curtains. The bathroom was very modern and had everything we needed, including laundry facilities which was very convenient.
Tim was also extremely responsive and able to accommodate our last minute booking and need for a late checkout which was exceptionally generous.
All in all, everything was great and we really enjoyed our stay. I'll definitely stay here again next time I'm in Berlin and highly recommend the space and Tim as a host!