This flame weeder is well designed. It's light & maneuverable, ignites with one click of the button, and a small canister of propane keeps it going for 'hours'. The flame covers a path about 3" wide, so it goes slowly over large areas, and since one's neck gets stiff after awhile, several minutes at a time is long enough. Safety and applicability issues: flame is extremely hot, can singe shoes or start a groundlevel brush fire~~and applicability: works best on small (1" high), newly emerged weeds (wilts/kills with a brief pass of the flame). Established grass clumps laugh at it, though, and re-sprout within days, even if 'cooked' and blackened. Same with deeper rooted plants (dandelions). For weed control on compacted gravel, in cement cracks, etc., it is a godsend. In Spring, needs to be repeated every few days as new weeds emerge, because it won't be so effective once they've developed deeper roots.