The space is nice, the kitchen is clean and well-equipped and the bed is comfy. Also good to have 2 shared bathrooms.
First the host kindly said I could check in early, but a few minutes before I arrived he said I couldn't because the shop where you have to pick the keys closed for 2 hours. If I had know this, I would have got the metro elsewhere and taken my luggage to a friend's house.
The kitchen has airconditioning, but no controller. If you choose a bedroom without aircon as I did, this means you have no way to operate the kitchen aircon either, without asking another guest (some rooms have aircon, so their controller works in the kitchen too). As it was 40+ degrees in Valencia, not having access to at least one cool room was very frustrating - despite repeated messages to the host during my 5 day-stay - and requests to provide a communal remote controller, responses were slow and unhelpful and he never provided one.