Everything was great:
1) conversation before the booking - almost immediate responses,
2) check-in - very flexible, Mike find us on the street and checked-in in the early morning (apartments wasn't occupied at that time, if it is busy there were also option to leave the luggage)
3) apartments itself - very stylish and modern (thanks to Mike's wife for decoration, flowers, candles and design overall). There is literally everything that you might need: iron kit, coffee+cream, tea, towels, soap/shampoo, all kitchen stuff. There is also elevator to 4th floor. Location is great - very close to city center, metro/tram stations.
4) Mike - very friendly and helpful. He helped us to bring out luggage to the apartments. Continues improving apartments (just installed conditioners). Answered all the questions we had and gave us valuable hints.
5) I haven't searched a lot for apartments, when found this one. I think the price was also very reasonable!
6) internet - fast enough for youtube/music.
Really amazing apartments! Highly recommended!