Staying in Kai's place was quite nice experience! It was very quiet, and peaceful just what I needed to take some time, work and have some online meetings. The room is downstairs, and it is very spacious, and everything was very clean, especially the beddings. Other than that, the bathroom and the house overall were clean all the time; during my 12 days' stay there, the common areas in the house were taken care of almost every other day. Kai is quite friendly and open for some small talk, and was asking whether everything was fine after I have moved in.
The neighbourhood is close to Sudkreuz train station, it is some 10 min walk, and the public transport (bus) just across the road makes other areas in the city more accessible.