I usually give five stars when I have no problems. Here, we've been ok, but with a little more effort it might have been 5.
The coffee machine didn't work, the stereo had no speakers (?), the water in the kitchen spills out from a dirty tap (didn't want to drink that water), the sponge for the dishes was dry and dirty and the shower cover was not big enough, so at each shower we had to worry not to wet everything in the bathroom. Plus, the fact that the room was tremendously warm might be an a good thing for someone, not for me.
However we liked the fact that the host took action when we asked him more towels (there were towels for one person, we were three staying for three days).
Taken alone, they are not heavy problems, but together might make the difference. The thing is, these are the same problems which were signaled by previous guests and they haven't been fixed.
All in all the staying was ok, the studio is cozy and the building is actually quite calm, but given these details, the price might not be in line.