The place is very big, we were 5 and had an extra bed and sofa. The location is around many good Asian restaurants, next to two tram lines, one going to Alexanderplatz (7 min by tram, 23min by foot). The checkin was fast and the checkout was very convenient for us as we left at 3am and just left the keys there.
Overall, it is not in the center, but highly recommended if you want to save some of your money.