A torch setup is one of the best investments you can make. I have used harris and victor torches and a harris is a far better torch imo, about like comparing a new corvette to a 1979 chevette lol. I personally prefer propane over acetelyne for cutting scrap. Like the other guys said it is a skill you have to learn. The adjustment knobs greatly effect how hot the flame is and the angle you have the tip at will determine how fast you can cut stuff. Also be sure to not stick the tip in the slag it's common sense but I've seen a moron do this until the torch wouldn't blow, he took the tip off without turning the bottles off and acetylene went in his sleeve and he got third degree burns. When you first start I would recommend getting a green welders jacket, face shield, welding gloves and slip on boots because if you have never used a torch you will blow sparks all over yourself until you learn tip angle, when to pull the trigger and so on. All in all being a burner is the most fun thing to do on a yard other than sell a big load lol.