I had a great experience during my staying in Berlin thanks to Chris and his girlfriend. it really felt like at home!
They were very helpful, easy-going and nice. The house is clean, well organized and the shower is just a dream! I could even cook my own food using the kitchen and the friendly cats were an extra bonus.
The location is excellent and it's both close to the underground stop and shops where you can get food or anything you might need. It was especially convenient for me because I could go to my office by foot.
I heartily recommend staying at Chris's if you come in Berlin.