Pros: The reception staff is excellent - helpful, informative, kind, and reserved a taxi to the airport for me. Check-in and in-and-out access is easy. The location is terrific and walkable to all the big attractions in Madrid. Plenty of furniture and kitchen accessories. Was great to have a fridge for groceries.
Cons: Priced too high for the quality. Our 2nd story unit had no exterior view, all windows opened to an elevator shaft; this did make it very quiet, no outside noise at all. You will however hear the upstairs neighbors including bathroom use noise. Some significant upkeep issues: filthy baseboard appeared to be covered in mildew, shower leaked onto the floor, some mold in shower and floor grout throughout, sink faucet heads need to be removed and cleaned (a chunk of black slime came out of one bathroom faucet during use and the kitchen faucet head had visible slime on it). With better attention to cleanliness/hygiene, this place would be great because of its location unfortunately, in its current condition, our apartment at least was unhygienic. I would not stay there again.