My sister and I stayed in this lovely two bedroom apartment for two nights while on vacation. It was the last stop before returning to the US and it worked perfectly for us. The second floor unit is exactly as described - it had everything we needed for a comfortable stay at the end of our time in Spain. Ylenia was a wonderful hostess - she met us to let us in and orient us and allowed us to stay a few extra hours beyond our check out time which helped us with our logistics. The apartment is in a great location for all manner of both touristy and higher end shopping and there are plenty of good places to eat within walking distance. The building is located along a busy road and thus the bedroom facing the street can be quite loud (and with a bus stop immediately in front of the building). This didn't detract from our stay at all (we both wear earplugs while traveling) but you might just want to pack some if traffic noise bothers you.
The apartment appeared to us exactly as advertised. It felt spacious after the tiny European hotel rooms we had been in although it is certainly modest in square footage compared to most North American flats. I would definitely choose to stay here again if I'm back.