The temperatures in Berlin during the week we rented were 80-90° Fahrenheit/26-32°C. It was hot, but not hotter than is now very usual in the summer in Europe (we live in Prague, where the summer temperatures are comparable to those in Berlin). This place — top floor/under the roof — was literally 40°C when we arrived. We asked the landlord to provide a fan. His response after a couple of back and forths: “In Germany usual we have a moderate climate, so AC or fans are not usual. I am on holidays myself, I can't buy anything I regret.” He offered us the option to “move out” and a refund. That was really not realistic given that pretty much everything in our price range was already booked. And the response that it is “not usual” to have fans in Germany isn’t consistent with our experience—we saw people in the flat directly opposite using fans. Anyway, we could barely sleep for the four nights we had rented – an unpleasant experience. The place has no cross-breeze – all of the windows open on only a single side of the apartment – so even with all of the windows open, it was stifling while we were sleeping.
Obviously, we spent as little time as possible in the rental, as at all times the temperature inside the apartment was at least 5°C hotter than outside. Everything else in the flat was pretty much as expected — IKEA, very basic furniture/dishes. It’s one of several rentals being offered in a small complex, so this isn’t someone’s apartment, but rather a rental unit. Everything was reasonably clean. The bare necessities of dishes/cutlery were provided — no tea/coffee/any staples that one often finds in an Airbnb. (There were also no dishwasher pods provided — probably an oversight.) The place is located above a stylish restaurant (Katz Orange) – there was moderate noise in the courtyard until about midnight (although it quieted down some at 10 pm) – and there were some noisy deliveries starting at about 6:30 AM on a couple days. Cigarette smoke also wafted into the apartment from the courtyard. The flat is situated in a stylish and unique complex of buildings (apparently an old brewery), and the Mitte location is very good — near a charming cafe (Distrikt Coffee) and Brewdog Beer Pub. The landlord responded promptly to emails and let us check in a bit early and leave our bags in the flat until 12:30 after the checkout time. If he’d just have invested a few euros into equipping the flat with a couple of fans, this experience would have been much more positive for us.