I stayed at this hotel because the Unique chain did unilaterally modify the terms of my reservation. I had a pre-paid booking at the Unique property on Talcahuano st. but I was informed at the moment of check in of that. The hotel staff reacted unatentively.
The travel agent reimbursed me most of what I had paid but the hotel experience was awful.
I had chosen the hotel strictly on a location basis. I had a tight schedule and I needed a hotel in Retiro area. I spent a lot of time commuting to buenos aires downtown.
I felt like a total idiot in the hands of a dishonest hotel chain!

Unfortunately this is one of those hotels with an amazing website but the actual product is not at all the same. The rooms are furnished in cheap silver spray painted furniture. The towels are very worn out, in fact you can almost see through the hand towel. My bathroom floor tiles were chipped and cracked and even the handbasin was damaged. The walls are wafer thin and you end up listening at the tv of the next door neighbor. They don't have a gym, but they offer a free gym card to one of the local gyms. I called a week in advance to make sure they have vouchers for me. They couldnt give me a voucher on day 1 because the vouchers expired. On day 2 I was given a voucher for a gym 10 miles away (why bother?). The staff is not very friendly. Breakfast is shockingly basic, with orange juice diluted with too much water.
To be honest, I would never return here, even if they offer it for free because the place is just depressing. Sorry to say, I don't like to point out only negative aspects, but honestly, I didnt find one positive thing to comment on.

Good: Nice Location, Pleasant Staff, Pretty Big and Comfortable room.
Bad: There was no available room in the hotel I made the online reservation (Unique Madero) and I was sent to Unique. I got really upset because I wanted to stay in Puerto Madero!
Expensive Wifi (US$ 14,00 for 12 hours).
Breakfast was a joke. There were sweet bread, 1 kind of cake, Coffee, Tea and Milk and that’s all.
Cleanliness could be better.

When we arrived at this hotel they told us they had taken too many reservations and sent us to another of their hotels located in "microcentro", which is not the best part of the city to go out at night. I assume overbooking is a way for them to fill all their hotels.

Anyway we were promised a better room (suite) in the other place, but asked the concierge to call them just to make sure, which he did. He confirmed to us they had a suite waiting for us.
Once at the other hotel the concierge told us that his colleague had lied to our face, as he told him during this phone call that they only had basic rooms.

So they wanted us to stay at a worse hotel, in a worse room for the same price, after having lied to us. At this point we decided to walk away and found a really nice place instead, the AWWA Suites and Spa.

I can understand technical problems and maybe even overbooking, but this was just too much. You'll find better places in Buenos Aires.