Our experience with Melvin's team (there are several persons involved in the management of the 49 apartments that Melvin has through airbnb) was very bad and sad. We asked for the cancellation of the last night of the reservation due to healthy problems of one of the guests. That was asked more than one week before the check-in according to airbnb policies. However Melvin's team refused to accept the cancellation even after the intervention of airbnb.
The only positive thing of the apartment is its central location, although it is important to note that the apartment is not located in "Puerta del sol" as the description of the apartment suggests, but near "Callao". The furniture is very old, only 2 of the 6 apartments have windows and the fridge didn't work and made terrible noises. We had also some problems with the television that luckily were fixed by Melvin. However, the fridge continued with the same problems.