Lovely spacious and comfortable apartment with everything you could need. A couple of minor points are that we had a bit of trouble locating the apartment. We found the address ok but weren't aware that it's to the right of a large door with the number 12 over it. We went through the large door! David sent photos but a description would have helped. Also, the towels provided are quite small.
The apartment is about a 10 minute walk from Sonnenallee S-Bahn station (S41 line from / S42 to Berlin) and very close to the M41 bus stop.
At times, you can hear other people outside talking or going about their business, but apart from the first evening when it sounded like someone was moving metal containers at the back at 9pm, this only occurred during the day so wasn't a distraction.
The response to communications was excellent and David even turned up at the apartment to make sure we'd got in ok after we had problems.