We stayed at the Hilton last week for five nights and liked the Puerto Madero area. We were upgraded to the Executive Floor. The Executive Lounge is good, but what they offer at various times doesn't change much. Overall we were happy with the Hilton and the location. The employees were friendly and service was good, although a little inconsistent at times.
We plan to return next year and we likely stay at the Hilton for the time in Buenos Aires.