I agree with everyone on the 110's. But unfortunately some of us live in older places that don't have 220 hook ups. I have a 110 Millermatic and not a pro, but have seen a pro use a 110 unit and think the way he did it would have held up fine. But again unless your really good with 1, the above statements hold true. LOL, I've had mine for 10 years and bet the darn thing hasn't had 5 hours of use.