The room is quite small - I thought it was just the photos that made it look that way, but it is indeed pretty tiny. However, it has it’s own bathroom, which is pretty nice and very convenient. The kitchen is also fully equipped(we didn’t cook, but it had everything). The fridge was stocked with the basic things to have breakfast in house - bread, butter, jam, some fruits, coffee and milk. Jorje also made for us and brought it (also for breakfast) a traditional spanish pastry - I forgot the name, sorry :-P .
Locationwise, it is perfect - the place is 10min by foot from Plaza Mayor and everything in downtown Madrid is at a walking distance. I guess due to being so close to the city centre it can get a bit noisy, but that’s what you get when you stay in the heart of the city.
The check-in was fast - we arrived in the late afternoon and shortly after I called him, his girlfriend came to welcome us. At check-out they let us leave our luggage in the apartment - probably because they weren’t expecting anyone that same day, but still it was a nice gesture :) All in all - I recommend.