Hi Joy I did the Travelshere version of this tour last Sept and loved it, a fantastic holiday! The three places you visit - BA, Iguazu and Rio - follow the same itinerary as the Travelsphere tour so I know you will have a brilliant time. I loved BA, a very grand city and the excursions to the ranch and Tigre delta were well worth doing. La Boca was great, very atmospheric and the tango show was very enjoyable. Iguazu was amazing, even better than Victoria Falls as the scale of the waterfalls is mind boggling, with plenty of photo ops. Rio was amazing and we saw all the main sights. If you get the chance to do a favela tour, make sure you do, it was really interesting to see how these communities function.
Any questions, I'll do my best to answer them although I'm away from next Monday for a couple of weeks!
Cheers,
Bob