My review:
When I bought the air clamp it was a piece of junk. The edges had small holes, I had to constantly keep pumping it up. The seller said to "iron the edges down to seal it". I did to no avail.
Also it's quite wide. You're looking at over a half inch going up your shaft. I'd rather have something like a quarter inch or less like a cable clamp.
Couldn't push it towards the pubic bone and kegel like I can the clamp to get that beyond normal erection feeling.
Would never get one again myself.