We stayed at the beginning of March and so it was a bit cold, but the air conditioning eventually did its job and warmed up the whole apartment.
Instructions were clear as daylight, with videos showing hot to check in and access the underground car park.
As for the downsides, the shower water pressure was too low for my liking and the general feeling that the place needs a bit of a renovation, with all sorts of marks and scratches on the walls from previous guests. It's not a deal breaker, but something to keep in mind.
Other than that, the apartment has an excellent location, with all of Malaga's main attractions within walking distance, as well as many restaurants.