I stayed for a whole month and before staying here I stayed in 3 other places (2 excellent hotels and 1 apartment) so my comparison is towards that. The apartments are in an excellent location, very convenient near supermarkets and the subway. Schöneberg is a kind of residential area, quiet and near everything. Lots of restaurants and cafés around. 15 min walk to the Tiergarten if you like to excercise in the park.
They are nicely decorated and are super super clean. It also has a nice little gym outdoors. My apt had a kitchenette so that was usefull. If you stay for a month they clean once a week so that’s really good. The sink got blocked a few times but they quickly came and fixed it.
The alarm went on once (I think they are quite sensitive) but in less than an hour fire people fixed it. Only problem I found was some noisy neighbours. However from the whole month I only had this problem 3 times. They don’t have anyone onsite, but they reply through whatsapp super fast (only problem with that is that by the time they send someone 2 hs can pass).
The TV works very well and you can screenshare Netflix with your phone. Wifi is very very good. Excellent comfortable bed, perfect pillows, great AC. There’s extra clean sheets and towels available and a washer and dryer. Perfect place to stay for a month.
Overall I had an excellent stay (noise neighbours can be found everywhere in Berlin) and I would definately recommend it. I will stay again with them.