If your talking about the dual mig 151 http://www.harborfreight.com/welding...der-97503.html
. I have 2, they are decent welders....but there are a couple issues.
It does everything I want, lays down nice beads on anything from sheetmetal to single pass on 1/4" plate.
The biggest issue is the handle/umbilical. It has a very soft rubber protective shield over the wires/gas line......the covering will rip. The liner for the mig wire is fairly soft plastic which will wear through...They do not offer this as a replacement piece, only a whole new umbilical....which is just as flimsy.
The fix is to either spend the $$ to get a new universal umbilical from a welding store, or hit up mcmaster carr and replace the mig wire liner with a piece of hard nylon tubing (Kinda like the stuff they use for airshocks). And replace the outer covering with suitable hose/or flexible liquid tight electrical wire covering. I had to rebuild my umbilical after about 2 years use.
The 2nd issue is ordering parts. I had a rectifier board go bad after probably 4 years use and it takes forever to order parts.....like 6-12 weeks. It was only like $14 for the part, but I was without a welder for 2 months......hence why I have the 2nd one, picked it up for ~ $120 when they were on sale.
Overall its a good welder, sure not a miller, but for a $150 welder its worth it.