I brought a sofa from Argos, the quality was good and it was how it appeared in the magazine. I had to wait 1 - 2 weeks for delivery. As long as you don't get any of the really cheap stuff your ok (as that doesn't last!)
I bought a leather sofa from Argos for a flat rental, because it was inexpensive. Two years on, it's still in reasonable condidtion, even though it hasn't really been treated with respect and it's actually more comfortable than my DFS sofa, which I paid over a �1000 for.