I've had a few of these things. A Bernz, this highly rated fancy POS, and a whole lot of the 99 cent throwaways. They all suck. Won't light, won't stay lit, etc. I'm down to buying 6 packs of the cheap ones because they work reliably a few times before crapping out and I've always got another one to break out.
I use them for lighting my Vermont stove in the house and bonfires outdoors. A propane torch works OK outdoors, but I don't really want one sitting around in my living room.