I have used the Thermarest LuxuryLite Mesh Cot several times now. My experienced (older) body was not happy with my old blow up pads, floats, and foam that I have used over the years.
I was looking for something that could give me a good night's rest and I found it. It's pricey but prices vary so check around. There is a regular size and a large size. The regular size weighs 3 lbs 2 oz. I use it for kayak camping so weight is not much of a consideration but size is. I have to be able to stow it in through one of my hatches.
The bow frame comes in several pieces including aluminum poles and nylon feet. It took me a while to get the hang of putting it together but it's really a breeze. It raises you about 3 or 4 inches off the floor and is especially appreciated during wet weather camping when wet gear can leave an occasional puddle that might get your a more conventional pad and bedding wet.
I would recommend it to anyone that needs to upgrade to a better system than the pads and mattresses for whatever reason.