The two of us stayed at Salvador's apartment for 6 nights. We had a nice stay, but it was not the best Airbnb we ever stayed at. The location is great: very close to the metro and in a lively neighborhood full of cafes and restaurants. The apartment is on the fourth floor and has no elevator. Don't underestimate the amount of stairs you have to climb for this ;-) (Actually, we counted and it was 77 steps to the apartment; quite some if you're carrying lugagge!)
The apartment is small, but not too small for two people. I would not recommend staying here with more than 2 though. The wifi is fast and the tv works, although we only used it with our chromecast so not sure how well the normal tv reception is.
The kitchen is equipped with an electric stove with two burners. There is an oven, microwave and a big fridge. A percolator was provided for making coffee, but there was no water cooker for tea. We also missed a dishcloth for doing some quick dishes.
The bathroom is small, but the shower has nice water pressure.
The bed was a bit soft for our taste, but might be perfect for others. Like most beds in Spain it was not made for tall people though: we are both about 1,70m and our feet were almost dangling out.
Eventhough the apartment is clearly recently renovated, it could already do with some maintenance. For instance, the doors leading to the french balconies on the street side of the apartment opened by themselves at some point and could not be closed properly.
All in all, we really enjoyed our stay at Salvador's apartment. At 50 euros a night it is good value for money :-) Salvador himself was attentive at communicating the checkin and checkout process. We were greeted by his friend who opened the door for us and showed us around.