If I didn't have some left over latex foam to repurpose*, I'd definitely consider the AirHawk, but free is for me. I just need to sew up an encasing fabric holder for it, and that's not hard as I already sew things for backpacking purposes.
* (Awhile back, I bought a 3" medium-firm latex topper for the bed. But my spouse has been complaining about it more and more being uncomfortable. So we very recently bought a twin XL latex foam topper in soft. She cut off 8 inches of it, and I cut the old one in half. She now has her soft side and I have my firm side. And now we have a lot of left over latex foam. Stuff is pretty amazing. Will outlast any petro-chemical based foam. Similar as to why they still add latex to butyl rubber for tires-increases the longevity/durability. I just need to figure out if I'm going to use the soft or the medium-firm version. The downside for the latex foam is that I really need to protect it from water, so the fabrics need to be extremely water proofed and the seams have to be well seam sealed.)
