Well I was able to log about 130miles on the aqua-aire cushion today. First off, in an earlier post in this thread I lied. The Aqua-aire is not 50.00 US. It's 39.90 plus shipping......sorry!
The cushion is black and disappears once you plant your arse on same. Normally I can go about 30 miles before the butt bones start hurting and about 50 miles before they go numb. I just don't have any padding back there guys!

Anyway I didn't start feeling any discomfort until about 100 miles and it was minor. I need to play around with the air/water mix a little to maximize comfort. I felt i had too much air in same but will let some out for next outing.
Dollar for dollar I challenge anyone to come up with a seat, cushion, whatever that does what the aqua-aire did for 39.90 US. Here is their website:
http://www.aqua-aire.com/
No I don't work for aqua-aire.

At 39.90 US I doubt they can afford any kick backs to me
WARNING: Do not take pressure off of cushion while at speed. It will probably fly off. I plan on coming up with a way to fasten it under the seat. I think aqua-aire is missing a golden opportunity not customizing these cushions for different applications. They are one size fits all but fortunately they fit well on cruiser seats.
I plan on posting this at Rat and R3.com....fyi