The Positives: A central interesting location, Mercedes is very helpful and friendly and the plaza and apartment are full of old-world character.
The possible Negatives depending upon your age: There is no lift and 110 steps to carry your bags up. There is no air-conditioning in the number one bedroom. But the bed is comfortable and the outdoor shower is fun.
I think the "Penthouse" description does not match what one generally expects with that term but the apartment is on the top floor and has a lovely view. Mercedes was very helpful with organizing efficient and cost effective car transfers from the airport and train station.