We have purchased our last 2 sets of mattresses from this place and have also recommended it to numerous family members that have also purchased theirs there.
I LOVE my pillowtop Kingsize mattress! We got it for SO cheap, but still the quality is amazing. I think the reason they were selling it at this store is because they sewed one of the seams wrong in the factory.
SO WHAT? Who's going to see the seams anyway, and for 1/3 of the price of one in the stores, you can't pass it up.
If you need a great deal on a mattress and don't mind some minor defect that you can't even see, then go here and buy a mattress! Ours even had warranty on it!