I bought one for my dad and me for Father's Day (no, I'm not a "father", but I couldn't resist.)

I think the pads are supposed to last 3-4 hours and the butane through 3 of the pads. I've only burned out two pads on mine and am close to having to refill the fluid.

They're supposed to be scentless, but my nose can pick up scent from them. I'm interested in seeing whether or not the "scent" will spook deer come early bowseason.

As for repelling mosquitoes, they work like a charm.

They have new "scented" pads out for hunting...I think they have one for "doe in heat" or something...and you can burn them and release scent into the air, but as far as I know, they don't have any bug-repelling power.

Overall it's a good product and if you're outdoors very much, definately worth having.