I wish they knew...
...that it is possible to set the air conditioning in busses to other positions than ON/OFF, it´s not too fun to do a 18 hour buss journey when you´re either shivering and then 15 minutes later trying to breathe in air that you could cut with a knife. Other than that the buses are great, we travelled in "semi cama" which means that seats recline to almost horizontal, meals are served during the journey, seats are big and comfortable, even a bit better and with more leg room than business class with most aerolines.
Timing is everything, seems like we timed our arrival to Argentina at the same time as their winter holiday season is, now when we arrived to Iguazu Falls the hotels were packed and we were forced to go into a bit overpriced but nice hotel. We checked out the Brazilian side of the falls the day we arrived as it only took a few hours. On the second day we spent about 6 hours wandering around the argentinian side of the falls, taking fotographs and gawping in awe.
The falls have to be the most incredible thing I´ve ever seen in nature, their scope was simply huge and the power of the biggest fall "devil´s throat" is almost scary when seen from just a few feet away.
Sadly I can´t upload any pictures now as I´m writing this in Asuncion Paraguay with a very slow connection, maybe later.