Instruct: Classify the given Amazon review as either positive or negative.
Query: Several Problems

Pro: Price, SizeCon:Doesn't fill easily. About 20% of used butane goes into torch the rest into air.Not that easy to start. Goes out oftenWith solder tips side ports vent hot flame into work areaSolder tips do not seem to heat. I needed to use flame for soldering with resultant burning of adjacent wiring insulation.