Melvin has a lovely apartment in a very good location, just off Gran Via. It's clean and in a good state. We liked staying here for 2 days to visit Madrid.
Although we did communicate our arrival time, we couldn't get in touch with Melvin upon arrival for 2hrs. No one at the apartment either. Someone else explained two hours later that we had the wrong number (as she returned the call with the same number we initially tried..?) This was inconvenient as we wanted to drop our stuff, and park our car.