Raul's place (small attic studio) was as the photos shown - it is small but functional for 1 person. I stayed for 4 nights and everything was great.
The WiFi worked perfectly well, strong signal and fast -
The location is perfect as it is walking distance to "la Chueca" area, Gran Via and there are multiple metro stations near by.
Plenty of restaurants, stores, pharmacies are near.
Raul's place is next to a 4 star hotel which is useful as the front desk was polite and helpful.
A few things that would be helpful are an additional heater (there is one and works but I personally get cold easily so an extra one would be great) and the hot water doesn't stay long (It may be an european law to save water) but as an american, I like long showers:)
I recommend the place for single visitors!