There are good sides and bad ones . Starting with the good . The busses are cheap , are on time , they are safe , the seats are comfortable ( cama ) and they go everywhere . If you want to fly from Salta to Iguazu or Resistencia , you have to do it via Buenos Aires , which is a bore . So we took the bus .
Not all busses are equal , the first had a very dirty toilet , the AC made a lot of noise and the lights over the seats did not work , so you cannot read . The second was very neat , lights were working .
Now the negative side : the second bus stopped a lot of times and each time people get on with a lot of energy talking and laughing before they settle down to sleep . This goes on all night . From 8 pm to 1 pm American blockbusters are shown type Thorn / Troy in Spanish . Loud . And the bus is REALLY COLD . I came prepared : t shirt , shirt long sleeves , pants , sweater and a downjacket and a sjawl . But sitting in 11 degrees for 10 hours was too much .
So it is certainly a good way to travel for some , nut not for me .