I sleep on my sides only (r/t snoring/awakening), and I've slept on many different closed foam, self-inflaters, and inflaters. I just used my regular length (14 oz.) Neo-air for 4 nights out.
Wow! is it comfortable. The chambered system works so well that even when sitting-up my butt doesn't touch the ground. The crinkling discussion is way over-cautionary. With my Megalite bag on top, all crinkling was muted to the point I couldn't hear it.
I know right now it's overpriced, but it's honestly one of the best pieces of equipment I put in my pack.