A great place to stay while exploring Madrid! The apartment was clean and we loved the unique design aesthetic! Antonio was excellent at communicating and even let us check in very early (since it happened to work out with the previous guests leaving early). The apartment was equipped with everything we needed (even pods for the washing machine) and there is a closet with extras of everything, just in case you run out. Also, the air conditioning worked very well!
One small note - If you do happen to check in early on a Sunday, your Uber/taxi may need to drop you off a couple blocks away. There is a very popular Sunday antique market in the area, which is a lot of fun, but it makes it difficult/impossible for a taxi to get to the street the apartment is on. It wasn't a big deal for my wife and I, and I'm fairly certain the market is cleared out by 3, so if you check in normal time it's not an issue.