Guillermo's place was lovely. It's a beautiful apartment with tons of outlets. Recoleta is an extremely good base of operations with lots of taxis on the next street over and lots of bus access. Look up in advance how to get a SUBE card for the buses - it is a trial and a half, and there is not one at the apartment as of October 2022. I was relying on public transit, and all the kioskos were out of SUBE cards.
Balcony was lovely. The bed was exTREMEly comfortable. The busy road meant some noise but nothing excessive. There was a desk and a lot of storage space, and the lighting was bright and warm.
Some of Guillermo's advice and info on the listing didn't work out or was slightly out-dated, but he was extremely quick, responsive, and supportive. The shower curtain looks pretty but is not very functional.
Note for my fellow US tourists: the "dryer" function on the washer is an air dry function. You may have to "dry" twice and you will still want to hang up clothes afterwards. Noting this so you can accommodate for time!
Check-in and check-out were done with a 2nd person. She was efficient but standoffish, and when I checked out she inspected the apartment with me still there and then followed me and my bags outside, which felt a little strange.
Overall, my stay was lovely and I think with a couple small tweaks, it would have been perfect!