Positives: Clean room, great price, friendly staff, elevator, good Indian restaurant with outdoor seating, convenient location in the middle of Berlin and close to the U-Bahn (subway).
Negatives: No free Internet access (despite what they say), cleaning staff did not get or respond to repeated requests I made to the front desk, offers made to regular hotel guests (such as free beer and bottled water) do not apply to AirBnB guests, staff did not know where things like ATMs or electronics stores were and did not offer to find out.