First of all, I lived in this apartment for a little over 10 weeks so my review is for a long-term-stay.
From a positive side the apartment itself as well as the location is really nice. You'll live on the 22nd floor with a nice view, and the Skylounge on top of the building is very nice in order to relax. Further, you can find a lot of good restaurants around the apartment and if you're willing to walk for 10-15 minutes you can even find some really great ones. In general the apartment is how it looks in the picture so you get what you expect in that regard.
Still, there were a few things that were unpleasent all in all. The internet is not really working well. On average there is one day per week where the Internet is so slow that you can't use it properly or just not available at all. Even though I tried to ask Oskar about that, I never got a proper response over than a "It should be working.". Moreover, I feel the communication is the biggest downside for this apartment. Texts are sometimes answered quickly, sometimes slowly and sometimes not at all. Further, there was one incident, where the lights were not working for a little more than a week. This was apparently the result of a communication missunderstanding between Manuel and the Electric Company. As a compensation for the week without lights, Oskar told me that I would get a discount for my stay there. Even though I specifically asked again at the end of my stay, if I would get that, nothing ever came of that.
So all in all, the apartment is very nice, but the management and communication leads me to the conclusion that you are probably best advised to look somewhere else for an apartment (especially if you want to stay there for a longer period of time).