perfect location close to everything. extremely quiet. For American people, it's located on 2nd floor (in germay they count the 2nd floor as first) so you got some stairs to go.
in the hallway smells like cigarettes, but once inside the apartment, we didn't smell anything and was comfortable.
the restroom could be a challenge, the shower is small and it's like on a step, a little slippery with the soap so got to be careful. we were only given two towels to dry ourselves so make sure you ask for more when checking in. also the shower curtain is too short and water might come out, definitely suggest a longer shower curtain.
we were there in winter. the apartment was a little cool and took a while to warm. we lifted the curtains to block the windows and helped.
overall all was really a perfect location, comfortable once used to it. definitely would stay again if visiting Berlin again. really pretty. The price was great as well.