Originally Posted by Big Kahuna
I bought the same unit here in Canada, it is advertised as a weed burner. Have tried it and it takes a while to burn weeds, but of course I use it for starting my Kamado smoker. A tank usually lasts me six months. Word to the wise make sure the valve is all the way closed tight or you will be replacing the gas canister a lot more quickly than that. Great unit and it only cost me $20, not as good a deal as yours but I have used it for the last three years and am still using the same igniter unit.
When you say it takes a while to burn weeds, I think you will find that all it takes is swipe at the weed with the flame to kill the weed, you don't actually have to burn it. These were used years ago mounted on cultivators in cotton fields and were called flame cultivators. The tractors were moving at several miles an hour with the burners pointed at the base of the rows and they did a good job, the propane was just too expensive.