I've got one that is on its last legs, but that is after over 10 very hard years wear. fabric on the arms has worn, rest of sofa is fine, and not saggy or baggy
It is a sofa bed and is good as both a sofa and a bed, IYSWIM
Not as much choice of covers/material as in other places IME, but much cheaper.
and thinking about getting another one
a good choice for a 'family' sofa that you will not go crackers over if the kids make a bit of a mess on it.