Hi Dave and other travellers!
Many thanks Dave for your very kind comments! The JY tour is virtually identical to the Travelsphere one, except TS starts in Chile and also visits Mendoza, so you could say that they are really the same regarding the three areas covered by the JY tour - Buenos Aires, Iguazu and Rio. I had a brilliant time and loved each of the places we visited. Highlights of BA were the trip to Santa Susana ranch, with the gaucho show great fun (with great food and copious amounts of complementary wine!). I also came across a colony of leaf cutter ants in the grounds there, travelling in convoy for hundreds of metres - fascinating and I got some great coverage on my camcorder! The tango show was excellent and Recoleta cemetry very interesting. The only disappointment was that we didn't have more time in La Boca (only 50 minutes, including lunch) - perhaps it will be different on your tour. The Tigre Delta was relaxing with nice scenery and the city of BA itself very grand.
The Iguazu Falls were, of course, spectacular, much more so than even Victoria Falls. We had loads of time to see them from the Argentinian side and the following day from the Brazilian side. Rio was wonderful, the most incredible setting for any city I've ever visited. truly beautiful. We had a packed couple of days there. If you have time, ask the tour manager/local guide if it's possible to have a favela tour. It wasn't part of the itinerary, but the local guide offered it to us for a small charge and it was extremely interesting.
Any other questions, I'd be glad to help. The food was excellent throughout - I put on half a stone! All the hotels were of a very high standard.
All the best,
Bob