We stayed at the apartment for four night in January (very very cold weather!) the apartment was lovely, cosy, warm. Amazing shower! We were provided with Wifi logins which unfortunately ran out the day before we checked out. We arrived several hours earlier than the stated check in time for 4pm but Mrs Wozlyck (the neighbour) let us in anyway and let us have the keys. Check out time on the last day was 11am but our flight wasn't until 7:30pm so we texted her to ask if we could leave our luggage in the apartment and give her the keys at 5pm, she said yes. Steffi replied quickly each time I sent her a message (she wasn't in Berlin during our stay). Overall a lovely place and flexible, kind and helpful hosts! The neighbourhood was a good place too. Either end of the street were underground stations on different lines so great location. The neighbour above us was a little loud as you could hear them walking at late night but we were so tired each night you would fall asleep easily! It's on the ground floor so you can hear people talking as they walk past the windows but there was never any loud shouting. Great experience, definitely recommend!