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.
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.