I have a number of trigger based clamps. They perform a function but they are vastly inferior to twisting G clamps if you need to apply significant force (ie. not move when you are working).
Thus far, I have never cracked the mechanism on any of my trigger clamp clamps but, that said, I have never purchased a "cheap" one.
They do however "creep". You can be working on trigger clamped materials, and the clamped matter will shift through vibration.
Granted, you mentioned "limitations" but I wish that consumers were warned of those limitations at the point of purchase.