We had a great stay, it's the perfect apartment for four days in Madrid! The location is the best part, close to everything, be it small plazas for tapas or all the tourist attractions.
The internet is great, the amenities are very functional and the apartment is actually quite spacious (and there's a view!). The fan is more than sufficient to cool the apartment, we had no problems during the 30ºC nights we had. The only thing I would say was missing is a coffee machine, but soluble coffee was provided which was great.
Alvaro was a super host as well, great check-in/check-out, communication and suggestions.
I would book again for sure!