I can highly recommend this place. The still relatively new building has direct access to ul. Marszalkowska, but is located in second range, so that it is very quiet. All kinds of services and entertainment facilities are in immediate vicinity. The flat is a well designed studio, ideal for one or two persons.
The only thing that worried me a bit when I moved in is that the key can only be turned once instead of twice. Also, the second lock, that can only be used from inside, does not work at all. Furthemore, the door handle is not exactly mounted as it should be. At the beginning these things worried me a bit, but I spent almost two months at the place and nothing happened and eventually I felt very safe. Still, security can be enhanced if the owner repairs these things. There is a very gentle guard downstairs during daytime.