We see no noticeable sleep or comfort difference between the .CA. King Ghost bed and the traditional .CA. King mattress and box spring that we slept on for 20 years. For us the only major difference would be no middleman which keeps the cost down. Sorry but nothing is supernatural about the Ghostbed.
The ordering and shipping process was exceptional. The initial few nights on the bed were a little rough for my wife, however after the first week my wife and I have been sleeping better than ever. The bed is more on the firm side, which I prefer but she wasn't sure about. If you are looking for a new mattress, I would recommend GhostBed.
Seems like a well made bed. Very little odor. Edges seem more supportive than some other beds I've laid on. But, its much too firm for my taste. Reviews made this out to be fairly soft but its not. Maybe a 7 / 10 in firmness. My wife couldn't sleep on it more than 3 days without going back to our old bed. I gave it more time, but kept waking up with sore shoulders (I'm a side sleeper). Ultimately, we are going to have to end out sleep trial early.