I spent almost $700 on a mattress and box spring and I have yet to use my box spring for more than a month without it shifting out of place. literally. I have been sleeping on just a mattress on the floor because the tops of these box springs just keeps sliding off to the side.. NOW, thanks to this RIDICULOUS issue, my mattress is also crap as it is curving at the sides. highly disappointed in my first ever big purchase. thanks rotmans