I've been staying at the Hilton Buenos Aires since they first opened in 1999 and have been there for months since. I've actually felt that I was treated better as a HHonors Gold than as an HHonors Diamond there ... but that's because I've been treated well as an HHonors Diamond too. [The slight exception is extra-late checkout is becoming more of a challenge and cell phones are not always found in the room like they used to be. (Of course the hotel will supply one upon request and it's easy to forward all your room calls to said cell phone.)]

The hotel is good, rooms nice (business-type) and the staff universally helpful and/or pleasant (or more likely both). [Unfortunately, I've never gotten one of the rare suites the hotel allegedly has.... but then again I've never asked.]

I have my choice of hotels in Buenos Aires and I do the Hilton 95+% of the time. Cabana las Lilas is part of the reason I do the Hilton too.