I would use Argos as a last resort. Bought a three and two seater sofa from them when I first moved into my house. They were a good price and as with everyone moving in for the first time, cash wasnt free flowing.
The first couch sunk after a few days, sent that back and the same happened the second. Its not like it was being used a lot, as the two in the house weren't even there most of the time.
The third went the same way, I persevered and got my money back eventually. The fabric was nice to look at, but nasty to the touch. You could also feel the wooden frames and the cushions sagged very quickly.
Comfort wasnt a thing either.