I had an airhawk for a couple of weeks (cruiser small) but sent it back. I feel that the shape of the saddle causes the airhawk to inflate round your crown jewels even when you put only the slightest amount of air in it. It works alright, but when cornering it sloshes you around a little and I find it didn't suit my riding style. - I have just bought a second hand Sargent seat from ebay, and it works a lot better. If you are ever in preston, lancs I can swap seats and let you try it...
Cheers