Just kidding Air dusters are just that air dusters canned air... Although I do have to say the trigger system seems to be better than most others and for the price I can't complain.
The can of duster is fine. The problem is that the plastic straw doesn't fit properly. It's too fat and what happens is the the straw flies off when you try to blow off some dust off something. I had to use a straw from another product that's thinner. it fits in the hole better because it goes in deeper. That works just fine.
This keyboard duster is easy to use and works very well to remove dirt that gets down between keys and cause them to stick. As the label warns be careful not to use for too long becaue it gets very cold. I would definitely recommend it.