I also have the cheapo Irwins, and the screws come loose, and you lose them! (can probably fix that issue with thread lock). Also when you snap them out of clamping pressure, they tend to hurt you! (These are the cheapest light duty ones though) not to be confused with heavy duty, which are far superior.
If you squeeze the grips as if to tighten, then pull the release trigger while squeezing, most all quick clamps release much more easily without that vicious slap to the trigger finger.
I'm a fan of the lightweight one handed clamps too. They get the most use. Buy pairs or fours in various sizes from 6" opening upto the 450 and 600mm ones.
Irwin blue are easy to use and v light. They are on promo regularly in packs of two .
Irwin extreme far heavier and stronger.
I would like to try the orange Jorgensen ones too. They do a medium duty quick clamp including 18, 24 and 36" sizes. These bigger sizes are useful and the heavier duty build is more durable than the lightweight Irwins.
I've recently been introduced to some really heavy duty clamps from Piher (Spain). Very impressive. Stronger and easier than G cramps. They do lightweight ones too and if I saw those anywhere, I'd be tempted.
If you use a tracksaw, then the Bessey or Axminster steel clamps with a red or blue lever made for clamping the rail are quick and strong with a 5 or 6 inch opening - not just for the saw track. They are not one hand use though. The jaw slides too freely on the bar until put under pressure.
Lidl / aldi clamps are "the wrong way round" and not so nice to use as Irwin etc. But they're such good value you can't pass up buying a few (never too many clamps, right ?). They only need to help out on a couple of jobs to pay for themselves.
