Great place, perfect location. We were a quick walk away from the Museums, restaurants, parties and stores in central Madrid. The apartment is just like the pictures show, clean and refurbished. Everything worked well.
Hosts were great. Several days in advance they communicated with clear instructions and great local recommendations. Oleg greeted us upon our arrival, made sure everything was clean and working, and showed us how everything worked.
Something to take into account is that having air conditioning in Madrid usually means having an a/c unit in the living room (not in the rooms). For this apartment they added fans in every room. This seems to be the case in pretty much every place we visited.
Overall we had a wonderful experience and thank Oleg and Olga for hosting us. We highly recommend their place for your stay.