Good quality.  I bought this because we needed something with greater than 500lb weight capacity.  We bought king sized Stearns and Foster which weights 100lbs.  The warranty on this thing also demands a flat surface, so we also have two twin foundations.  I dont find the mattresses shift as others have reported, but there is a bit of weight holding them in place. It seems very sturdy and held our queen mattress for one night.  Weight distribution is great on this frame.  Dont expect much storage under the bed, maybe vacuum sealed blankets or shoe boxes.  The design makes it difficult to store under the bed.  My main priority was weight limit.  


Oh...easy to assemble was a plus.