The box spring itself is nice. Only reason for 4 stars is because the wood was a bit warped. It was difficult to get the wood to screw in and actually be flat, but we were able to figure it out.
My wife and I both got our first really good nights sleep in a long time! The foundation took a little longer to build than I antisipated, but it was still very easy to put together. You have 101 nights to try it out. Try it out. You wont be disappointed.
The Ghostbed foundation came with the purchase of our Ghostbed King sized mattress. If it hadn't been included, I would not have gotten it for the price point (it's just a bunch of 2x4s with a cover). The wood was warped, which made it difficult to drill some of the screws in, which combined with the fact that the screws were a little short. I ended up hand-screwing most of the screws, because the wood kept popping off (even when I was being careful not to strip the hole by over-drilling). Fortunately, they include plenty of screws, meaning that once the foundation was assembled it stayed together well.