We really enjoyed our stay at Peter's apartment! It was a good large size, the beds were comfy and the bathroom and kitchenette were well equipped. It was in a good location too, with shops, restaurants and public transport within walking distance. It was also within walking distance to checkpoint Charlie and many museums. We had a late check in but Peter was ok with that, and an early morning check out was also easy! Like other people have described, you have to walk up 6 flights of stairs, but that was fine for us. Many thanks Peter!