I stayed in this flat for almost two months and was perfectly happy in it. It has everything you could need for a short stay in the city including a washing machine, and the Internet is excellent. The location in upcoming Neukölln is good - the 171 bus route from Schönefeld Airport stops about 5 mins away and the M41 bus takes you directly to Berlin Hauptbahnof, and the U-Bahn, too, is also within walking distance. The heating works well, so even though it's an old building, it's nice and warm inside and there is always hot water. There are three supermarkets nearby and a shopping centre within 15 mins walking distance. You also have a beautiful old swimming pool around the corner - the Stadtbad Neukölln, which is well worth a visit. I didn't meet the hosts while there but the communication via email was excellent, and I'm sure if there had been a problem while I was there, it would have been quickly sorted out. All in all, to be recommended.