This is probably as good value for money as you can get in central Madrid.
Location - 10-15 minute walk from the absolute center, and next to the Royal Palace. But far enough from the nightlife to be quiet at night.
The immediate neighborhood has some mini markets and restaurants, but for the good ones be prepared to walk ten minutes or take an Uber
Apartment - lots of space for 1-2 people, super well equipped kitchen and washer, very nice layout. Ground floor.
Handover - very efficient, fast good communication, self check in worked perfectly (as long as you master technology)
This was a fairly long stay, and the apartment is large enough and well equipped for that - much better than being stuck in a small hotel room
And yes VALUE … super reasonably priced