I have one that's working well (for a week+ now). The button sticking shouldn't be a disaster because it has a cutoff of about 10 seconds. I did notice one oddity: as the batteries run down when I hit the button it won't fire only blink and immediately after it will fire again when I hit the button. Not sure if that's a feature (to warn you to change batteries soon) or a bug... Also the button did stick on me twice when I banged against something by mistake and I needed to gently pry it out to get it unstuck. All in all worth the money in my opinion...