I am SO impress with this frame!  It is solid wood has the slates attached together with velcro so it sticks to the frame velcro straps so no movement.  Wasn't sure how it would be without a box spring but can't tell the difference.  Was thinking about buying the $1000 frame but decided against it.  Saved over $800!!  I highly recommend this frame.  The other thing I took into consideration was no third leg on the out side which I always ended up banging my foot against!  The extra support is in the middle and made of metal.
Excellent frame!!