Very nice location. Great balcony with a view of a sort of courtyard with grassy areas and pools from several neighboring buildings. The walls are thin between units but it wasn't an issue. It was very clean and has a nice bathroom and good internet. Make sure you go to the famous empanada place La Cocina, which is very close. It's a small, calm building. On weekdays the pool was usually empty.
You need a key to exit the building, and the self-checkout involves having someone hold the door open for you while you go upstairs and lock the key in the room. This is easy if you are traveling with people but if you are alone you need to ask a stranger, such as an Uber driver, to leave the car and hold the door open for you. If you don't speak Spanish well, you might want to check about this before booking to see if someone can meet you instead of doing self-checkout.
It was a great experience and I would stay here again. Thank you!