This an awesome apartment right in the heart of Madrid. Carlos was friendly and accommodating. The apartment was clean and exactly as was shown in the photos. On top of the usual coffee maker, cutlery, plates, pot and pans, it had a few extra things such as an iron + ironing board, and hair dryer. There was a laundry in a shared laundry room downstairs. Wi-fi was blazing fast.
The only annoying part of the stay was a squeaky bed. It was impossible to sleep on it without making noise. Luckily there was a folding futon next to the bed, which we ended up sleeping on.
Within a 10 minute walk there is a supermarket "lidl" and a few coffee shops.