The travel company was outstanding and went beyond my expectations. They met us at the airport, arranged for a terrific tango dance instructor, gave advice on local restaurants and helped us find a pair of sunglasses at a restaurant for which we couldn't remember the name or the exact location in Colonia. They were responsive to my many questions via email and were gracious when we picked at hotel for which they couldn't get a rate instead of one for which they received a commission. Definitely book with this Argentina travel company!
Argentina is a great value for Americans these days.
Three highlights of our trip were:
* Dancing at milongas after midnight in Buenos Aires
* The rush of Iguazu Falls
* The angels on the monuments at the Recolata Cemetery
Bypass Colonia. Stay in in Barrio Norte or Recoleta instead of the Microcenter (a bit depressing and not a place that feels comfortable walking late at night.)