We stayed at Alan and Kasia's apartment for a short stay in Berlin. Although I didn't meet Alan or Kasia during our stay prior our to arrival communication with Kasia was easy and quick and they have quite an extensive guide to Berlin which was great. The location of the apartment is good too, right next to the S Bahn station and supermarkets with free street parking available. Unfortunately the let down, as mentioned by other guests was the cleanliness of the apartment, particularly the bathroom. The drain has a very strong smell and it could use a good scrub. The apartment is also very basic in its amenities. I do agree with some other reviews that it is possibly priced a bit too high for the value of the accommodation.