We had a lovely 5-night stay at Kristian's place over Christmas. He was busy so his friend Laila checked us in—she didn't speak much English but pointed out all the points of interest on a map, and recommended a few places for food, etc. Kristian followed up with an email right after we checked in with his list of recommendation, which was well appreciated.
We had to walk up a flight of stairs to get to the elevator; since the elevator stops in between floors, we had to walk up another half flight of stairs to get to the apartment. The stairwells were wide, so it wasn't a problem at all, but I'd take note if you need to avoid stairs at all cost.
Our stay was great, and the apartment was as described. There was one double (I'd guess it's Queen) bed in one bedroom, and bunk beds in the second bedroom. The kitchen was well equipped, with all the utensils and tableware we needed. The apartment was only a 3-minute walk from a grocery store, so there's no problem if you wanted to shop and cook yourself.
Overall, a wonderful stay at a great, clean apartment!