Great location. Apartment is adorable, small but just as desired. Perfect for us two. Kitchen and bathroom are not too modern but it does not matter if you are visiting Madrid and eating out the whole day.
You need to be aware that there is no wifi and therefore we had to go to a free wifi location a couple of times.
It has great restaurants surrounding the apartment and so close to it all.
The air conditioner definitely had issues but it did what it needed to keep the apartment cool at night.