Had the sofa for just under 18 months now.  Within weeks, the cushions started to dip.  Originally stated as 21" seat height, we now have 17" on left and right cushions and 16" height in middle. It also appears the the sofa itself is buckling under the middle cushion.  Appears to be some sort of plywood/cardboard combo versus actual wood along the front.  Now, ends  lean towards middle cushion, therefore achy backs, pinched nerves from trying to sit upright on left/right sides.  Nothing what we expected and sadly disappointed.