I thought the communication with Alex went very well. If we didn't know something we could text or e-mail him and he would answer quickly. Everything what we needed was there in the airbnb! The only thing was that it got very hot in the apartment when it was 37degrees outside. The little ventilators couldn't handle the heat sometimes hahah. But we were out a lot anyway so luckily not too long in the heat! We had a great time in Berlin and the airbnb certainly helped. Thanks alex!