I really liked this property. I met the GM when I asked her a question, not realizing she was the GM. She sat down and chatted while I was enjoying my complimentary glass of wine, which I got as a Diamond member. Also had a fruit basket and a full bottle of Malbec in my room on arrival.
The location is perfect being smack in the middle of San Telmo. You walk it the hotel door to the Plaza (where the Sunday market is) and you have all the antique stores, galleries and restaurants you can poss lay want to visit.
The room was very comfy and looked over the inner courtyard and it was very quiet. I slept thru breakfast so can't comment on that
I would book this property over the Hilton in a heart beat. No exec. Lounge at the Anselmo so that is the only trade off and I think it's worth staying a the Anselmo even without the lounge.