This is a beautiful apartment in a perfect location! Spacious, clean, and very cute. We especially enjoyed the balcony - there's a privacy sheet that blocks the alley, so you just look across towards another unit in this building. There's no unit blocking the view above this one, so you get direct sunshine especially in the late morning. The shared roof is also wonderful, with strong wifi and power outlets, bathrooms, etc.
We're sensitive to noise and this building is in a busy area, but the bedroom was very dark and quiet with the double blinds and white noise from the A/C unit. But I wouldn't recommend using the second bed (couch in living room) unless you're a very sound sleeper, as the balcony door seal lets in noise from the street, and there's also noise and light from the hallway.
The staff was very nice and helpful with always letting us in, and anything we needed (like extra garbage bags, watching our luggage after checkout, etc.) I was unsure about the check in process since I don't speak Spanish, and the doormen don't speak English, but it went perfectly smoothly. Just have tell them your name, and the name of the unit you're renting. Keyless entry was nice.