Only down side is people not wanting to spend the $$$ for one. I slept next to a guy a few years ago who had a new BA and I was using my NeoAir for the second night I believe, his was quite noisy. I do not notice any noise, whatever noise it had went away in a short amount of time. You may find some used ones on Backpacking Light in the appropriate forum there. A few are cropping up now, I imagine they are wanting the next latest and greatest. I've used my short on dry, sand into the single digits with a 15F degree bag. On cold or frozen ground you would need at least another pad if not a winter type mattress altogether.
Duane