This was our first time staying in Madrid and we couldn't have picked a better place to stay. We stayed for 3 nights Sun-Wed. We saw so much of the city in this short time because the apartment is really in the middle of it all. As a gay couple, it was especially nice being near the main bars and clubs in Chueca. We were never more than a 10-20 min walk from most attractions or restaurants.
There was a bit of street noise at night as other reviews have suggested, but it didn't cause us to lose any sleep.
The place was clean, shower had plenty of hot water, bed comfortable... there was really nothing about the apartment we would have improved.
10 out of 10 would stay again.