My stay at Rik's place was Ok overall. Here is some info that may help future guests:
1) when you arrive at the entrance to the apartment building and need to decide which apartment to ring, look for "Tariq" (there is no "Rik" listed). Would be nice to have this included in the instructions.
2) There is only a bed in the room, no desk or chairs, or shelves to put your clothes on. Rik mentions use of his living room in the description - but it was never really suggested because Rik and his girlfriend were staying there. There is a wardrobe, but it is filled with Rik's clothes.
3) There is a TV, but no TV service. Rik suggested streaming from my own device, but I haven't tried.
4) Even if you get an apartment key it would be best to negotiate your schedule. One evening I spent an hour trying to contact Rik in all possible ways (ringing the door bell, texting, emailing) because the apartment key didn't work. Then, eventually, rang the doorbell for a really long time, which woke Rik up. Turned out there was a key inserted inside.
5) Ceiling lights, and bathroom lights above the mirror, didn't work. Also, had trouble with the shower (Rik said it had been broken by a previous guest). But these are minor things.
The apartment location is very good - close to the North station, buses, and tram.