My partner and I stayed in Roi's apartment for two nights in September, 2015.
First things first, Roi was an excellent communicator from the outset and always quickly and helpfully responded to our messages.
Roi's apartment is conveniently located five minutes walk away from a train station, and is nearby to a popular shopping precinct. The area around the apartment is quiet, safe, close to major attractions and is easily accessible by public transport.
The apartment is beautiful, clean, quiet and very comfortable. My partner and I particularly enjoyed the washing machine and dryer, having spent a few weeks traveling around. The bed is king size and comfortable - we both slept very well each night.
We thoroughly enjoyed our time at Roi's place, and would highly recommend it to anyone traveling to Berlin.