I have one. Works good, but mine is only a 100 amp. Wish I had more. They are made for Sears by Century. My neighbor has a Snap-On. It's also made by Century. Identical to my Craftsman other than the color and stickers.
Century web site:
http://www.centuryonline.net/catalog...p;catagoryID=6
My Brother also has a Craftsman. His is a little better than mine in that his has an infinitely variable heat control. Mine has 4 settings. The variable is better than the set 4. You can adjust it to the exact metal thickness you need. Mine will sometimes blow though because a setting is too high and the one below is too low for good penetration.
Later,
David Cole