I wasn't sure what to expect with this. I read a few reviews and decided to try it. I wasn't sure about sleeping on it at first, and put it on my armchair instead! I've now been sleeping on it for a week. I've put it inside a pillow case and it's amazingly comfortable.
Great product, I have been using it for 3 weeks, falling asleep on the matt like a baby, cant remember when I slept so well.
Deeply relaxing and regenerating but may be really painful for first 5 minutes (spikes are sharp) but after a while it turns into relax. I would recommend it to anyone.
I guess it is not for everyone though.