every sofa i have had has started off nice but before long the cushions become too squishy and saggy.
The one i have at the moment is from next , it looks lovely when i plump and straighten it but then as soon as its been sat on it looks like an unmade bed . its fabric but the leather one before it did the same .
As i am totally OCD 
with this sort of thing i really want to know if it is just inevitable or if not , what do i look for to avoid it ?