I have used one of these units for a long time..works fine for what we do in repair work..
I have found that mine will cut out if used too hard but I am aware of this and act accordingly..the only time I ever had a prob is when a buddy of mine tried it..he is used to the big production machines and he did overheat it..
Had to adjust him between the ears on that deal..!!!
Even if I get a different welder I will keep the one I have for those little jobs that I do..
I have tried most all of it and now do what is known to work..