Alessandra was great through the whole process of booking and Sasha was very welcoming during the checkin and always answered all my texts promptly during my stay. Very nice and professional people!
The apartment itself is in a high spec building, always clean, no probs with the neighbours—quite the opposite. Most of the receptionists speak English.
The surrounding area might get a bit busy at times, but nothing you wouldn't expect from being based in the city centre. The windows are quite good at soundproofing, so no problem with sleeping in quiet at night. The location is still worth it—I could cycle absolutely everywhere in max 20 minutes. Just superb. Good public transport connections as well. The U-Bahn station is literally just behind the corner.
There are plenty of restaurants, a couple of bars and enough supermarkets. There's also an Edeka 15 mins away by walk, which is open on Sundays!!! Most of touristic attractions are easily accessible by walk or bike. And, if you like clubbing, Tresor, KitKat, Kater are 15mins by bike or 30mins by walk. Even more clubs further down. You definitely won't get bored!
I've stayed at the flat for the most of the summer and had a great time. Can only recommend to everyone!