From prior to booking, all the way through check-in, the LuxuryRentalMadrid team was always very responsive and prompt in all inquiries I had which was greatly appreciated. They also were able to accommodate a very early-check in, which my family greatly appreciated after the long-haul flight.
The apartment is stylishly decorated and matches the photos on the listing. The bedrooms are on the smaller side, but I suppose that's true of many European apartments. It was nice to have a washer/dryer in the unit, although we didn't have much luck with the dryer. The clothes never felt fully dried and still required it to be hung, which seems to defeat the purpose of a dryer.
The only other cons are while the interior of the apartment is stylish, the apartment building itself is rather old and drab and did not feel very luxury. The walls are pretty paper-thin to both the neighbors and outside streets, so if you're a light sleeper, bring good ear-plugs.