Apostolos is a top host: helpful, polite and very fast in replying. Apartment is very good: well-organized and it has everything you need (kitchen, fridge, etc... ) and -very important but almost impossibile to have in Berlin- windows have roll-up shutter, so you could sleep with daylight. Bed is not king-size, but could accomodate 2 medium-large size male.
(ps: we didn't give a 5 star rating, just because I keep 5 star for designer rooms, but will definitly rebook from Apostolos)