This was my 3rd trip to Buenos Aires and by far this was the best hotel (FYI...the worst? - OMG DO NOT STAY AT THE MARRIOTT!) The place was pretty modern, rooms very clean, with a nice bar down in the lobby. Service was good and a small Irish Pub across the street. The place is very close to Puerto Madero (when visiting BA you should go here), about a 5 minute cab ride costing about 3 bucks. Just a couple of down sides (but not many). The walls are a little thin, in the morning if you go down for just coffee at the restaurant with intention of returning a few hours later for the full complementary breakfast (I'm an early riser) you can't do it :( One time in and no more :( Also the streets in BA are littered with trash bags where at night it is common for people to tear them open and toss the raw garbage about looking for anything they want to salvage. This occurred right in front of the hotel every night but it's obviously not their fault. It is a city government problem. The hotel is also close to the Pacifica Galleria Shopping mall (5 minute walk).
