We booked the "Latin Triangle" tour with Traveland.com. We were supposed to stay at a Kempenski hotel in Recoleta. However, we were switched to this hotel. Our unmet expectations from the tour company certainly impacted our impression of this hotel. Mayflower Suites is less expensive than the hotel we were led to believe we were staying in. If you get a good price, you will probably be more satisfied. Since this was our first visit to Buenos Aires, and we were looking for some assistance from a tour guide, our problems were exacerbated by the fact that this is not a full service hotel. The beleaguered front desk staff had to serve as concierge, cashier, housekeeping, and repair staff. The AC did not work and the window broke when opened. They were nice, but it could not make up for the fact that our tour guide from "Special Travel" took the week-end off and could not speak English. We spent Fri, Sat., and Sun. nights there. Centro was deserted after the Friday workday. My husband was mugged because the only people left in the neighborhood were tourists and muggers. Others in our tour group who stayed in Recoleta had a much nicer experience. I would avoid Traveland because they are unresponsive and not available. Mayflower would be good for people who know the area and what they are getting into.
And re: the previous comments about no towels--that happened every day. I think they only have one set of towels and wash and replace them if they dry in time.

My sisters and I stayed in a triple room for only two nights, actually we only went to buenos aires to see the gig of the totally awesome Jamie Cullum.
The room was pretty big and the beds were comfy; the recepcionist wasn't very helpful with information about distance, but he has a very good attitude... There are some things you must know about this hotel: the best thing about it is the location, a radiotaxi can take you everywhere in 5 to 10 minutes, and you can also take a walk to Santa Fe or Corrientes about 4 to 5 blocks away; the buffet breakfast isn't very good, there are lots of food but the quality is not the best (specially the ham and the cheese), in the morning it gets pretty noisy, actually we woke up with the tipical sound of constructions but this was around 8 a.m. and the afternoon is very quiet...
So, in conclusion if I visit Buenos Aires again and if my budget is the same I definitely come back to this hotel

We stayed at the Mayflower Suites for 10 days. The rooms are very spacious, with modern and clean bathrooms; however, several times we had to ask for the second set of towels after the room had been made up, a minor nuisance; however, the missing towels were always brought up right away. We also had fridge and microwave in the room (no silverware, plates and cups, but we took a set up to the room from the breakfast buffet, no problem). Speaking of the (included) breakfast: It's a nice spread with toast, croissants, cakes (!), serials, juices, coffee of course, ham, salami, cheese, marmalades etc., fruit salad -- definitely more than one should eat :)
There's a free Internet computer next to the breakfast room, but for in-room wi-fi there's an extra charge of US$10 per day. I used their free computer to check my e-mails etc., but I fear that eventually they might do away with this free service -- why else did they install wi-fi lately? However, there are plenty of cheap cybercafes in the city, one of them right next to the hotel!
The first night we spent in a room overlooking Parana street, which was quiet in the evening but got very noisy -- too loud for our taste -- early in the morning from the hustle and bustle down in the street (despite double-glazed windows), and upon our request the receptionist immediately accommodated us with another room out back (no view, but very quiet). Everybody working at the reception -- all of them speaking sufficient English -- is very friendly and accommodating, helping with taxis and information; they even got us super seats at a couple of tango shows and called in reservations at restaurants for us when we had problems reserving ourselves because of the Spanish language barrier.
We found the Mayflower Suites' location in Microcentro -- a couple of blocks from the opera house, next to a Days Inn -- very convenient . We often walked to Florida street and the tango places nearby (the Escuela de Tango in the Galeria Pacifico, the Academia de Tango on the Av. de Mayo, the Confiteria Ideal on Suipatcha, which we all recommend for tango aficionados!). To places a bit further away (Recoleta, San Telmo, La Boca, Palermo) we .took incredibly cheap taxis. After 8 p.m. we also always took taxis back to the hotel, no matter the distance. We never encountered a problem.
In general, we were very happy with the Mayflower Suites -- and the price can't be beat -- we paid US$74 per night, incl. taxes and breakfast buffet.

Found at the last minute after somewhere else stuffed up our booking, the Mayflower turned out to be an absolute gem. The rooms on the 7th floor are huge! The location is near enough the centre to be useful but still quiet enough to get some sleep (unlike the Colon), the staff were extremely helpful and we ended up staying seven days. When I go back, I'll stay there again.