The wife and I stayed at the Hotel Boca by Design Suites, as part of our South America tour and were pleasantly surprised. The hotel location is good and cetnrally based, if you want to get to the main areas, plus a metro station is literally behing the holtel. The hotel is football based, around the Boca Juniors team of Argentina and so around you will see a lot of reference to this around the hotel.
The rooms were really clean, and the beds are comfy and the staff are very helpful and multilingual so that made it a pleasure.
The rooms are well equipped with most amenities, including a large screen TV and Power shower and coffee machine. There is no Irons or Ironing boards - so you may want to bring along a travel one if you want.
Overall very pleased with the hotel.