I had a good stay at Alex's apartment. The studio is bright, warm and has all the necessary amenities. A note that can be important for some travelers - the elevator in the building stops not on the floor but between the floors, so yo have to carry your luggage or a child's stroller by stairs half a floor. I liked the location - it's easy and fast to reach the Messe Berlin, that was my priority in the location selection. So if you attend a fair and or an expo in Messe, this apartment is a good choice. Near the house there are lots of international and cheap places to eat, grocery shops and shopping malls. Communication with Alex was very smooth, he answered all my questions very fast. I didn't have a chance to meet him, but met Inna, a woman who helps him to host. She was very nice and pleasant, and ensured an easy check-in and check-out. Very good experience overall.