The apartment is beautiful and very well done. It gets lots of sunlight and hence is bright and cheerful to live in. Attention has been paid to details and the apartment is well-stocked with most amenities that you might need.
The location is in a safe neighbourhood. It's centrally located and walkable to most places of interest in Madrid. Lots of good places to eat in the vicinity as well. I'd go for it again in a heartbeat!