I stayed at this apartment for a full month. The place is confortable, clean, and nicely decorated. The bedroom is quite spacious and the mattress is particularly comfortable. The building is very safe (with security personnel round the clock) and the facilities are awesome: there's a gym and a laundry room right downstairs, a large rooftop pool with a lovely view of the city, a sauna, etc. The neighborhood, Palermo Hollywood, is very lively and the apartment's street itself is packed with very nice restaurants and cafés.
Both Julián and Paula were very communicative before and during the stay, and helped solve every small problem I encountered (I mistakenly locked the safe with the wrong code on the first day, and Paula came immediately to fix it, which was very much appreciated!). I would definitely stay here again and recommend this apartment to everyone and anyone.