This is a great apartment ideally situated in the heart of Madrid, very close to the main museums and in walking distance to other atractions. The area is nice with many restaurants and shops.
The apartment itself is in the third floor in a building with (small) elevator. It has three rooms with decent space and a rather small bathroom if it has to be shared with 3 or 4 people.
In general it's a great apartment, fully equiped, and the guys at Minty Host are very professional in handling the reservation.
The wifi connection was great as well.
Only minor complain is that there was only one set of keys and three sets of towels (we were four). They told us they would bring them the next day but that never happened.