I stayed at Anton's place for two nights and it was just lovely. We booked the apartment very spontaneously, but since the communication was so easy, the check in and check out worked very smoothly.
The apartment is spacious, light and very clean.
We haven't used the kitchen at all but it looked fully equipped.
Since the windows face the courtyard, it is very quiet in this apartment (which is pretty helpful since Berlin can get quite noisy;)).
However, the best thing about this place is the location. Right within Prenzlauer Berg, you have easy access to tons of cafes, restaurants, shops, subway stations, sight etc. You can hardly beat this with any other AirBnB apartment. Just awesome!