I sell them and have them in the showroom for $499
If they didnt work we wouldnt be selling them. Most of our customers run them off there gas drives but I have seen it demonstrated with 2 12volt car batteries (steel).If doing aluminum there is a modification that you will need to make to the gun. You need to make a jumper liner between the drive roll and the tip. For some reason they dont use one. If doing steel it is fine but aluminum will bind.
Let me know if you have any other questions.
If you want to demo it before you buy it come on over.
AGL Welding Supply