This apartment is one of the best options in Madrid if you're looking for something close to the airport. The apartment is reachable by a direct bus from the airport, and metro station is also close by. The neighbourhood was very beautiful, and it felt safe to walk outside late at night. There's a big shopping complex nearby with several restaurant options.
We received very detailed check-in instructions, so the process was quite smooth. There's everything you need and enough space for a short stay of 2 people. The bed was very comfortable, and there's some storage to keep your stuff. There are cabinets and a rack to hang clothes, but a cupboard would've been more convenient. We needed heating at night during the month of May, and the hosts were kind enough to turn if up for us. WiFi is very fast and good enough to take work calls or stream Netflix.
The only con is that downtown Madrid is a bit far, but it's easily accessible by metro. We also liked it this way because of proximity to the airport, and the absence of city noise.