Oscar's flat is great for several reasons. It is beautiful, extremely well situated, very close to the subway, close to the main touristic attractions (but far enough to avoid people shouting at night when they go out of bars). There is a large supermarket (Mercadona) right in front of the house, which is perfect. Aircon was much appreciated
Two "minus" points : when we were there the flat was extremely nboisy as there was construction work in the house next door , so every morning at 08:00 the noise was sure to make you get out of bed. Not Oscar's fault of course !
And something that can be changed easily : the cookingware is really...well... minimal ! No kitchen towels, no scissors, no bowls, no salt, no heatproof mat, only one cutting board. Honestly, investing 30 € in a little equipment would be a great idea :)
We had a great stay anyway, but an attention to small details like that would have made it perfect.