I am very happy overall with this unit. It is both a time and a money saver as you are cutting down on overall oxy/fuel use and spending less time lighting and adjusting your flame. The only reason I gave the four star rating is this: the rod/lever that the torch hangs on wouldn't work on my Smith AW1A welding tips. The tip shafts are smooth so when you try to hang the torch, it wants to slip right off. I fixed this by brazing a simple sheet metal bracket on the end of the rod and now it works great. The unit is heavy duty and at some point I believe will pay for itself in oxy/fuel savings.