Easy to get to from the airport, and good food reasonably close, but you'll want the U-Bahn if you're going to the city center.
Comfortable beds and a clean place, slept well.
Our host was very responsive and provided lots of helpful information, as well as detailed check-in instructions.
Would have preferred to have a living room too, but the kitchen was spacious enough to hang out, and we were in Berlin to see Berlin anyway, so not a huge deal.