long distance Bus form Buenos Aires

When looking for connection on Buses to Iguazu, I came across this website and thought it might be of help to TB members:
http://www.omnilineas.com/argentina/bus/retiro/puerto-iguazu/
as you can see from this site it gives you a destination and the Bus Company going there / time of travel / type and cost of the trip
We found too the place where you can buy the tickets directly (stall of the ticket sell)
It is worth wile to look in to what type of services is offered on the trip, as some Bus comp. will serve food / wine ect. Where others do not.
So perhaps you can look in to this before you go.
I personally did not find much difference of Semi Cama to Cama other then the seats where a bit wider but the recline is still only 60%. The cost however is in some cases rather at a larger difference – then again the service is different!
Hope this might help some of you!