I owned three Miller migs.They were a mm130,mm130 xp,mm185.I used the little ones alot for bodywork,muffers,and about everything that could be welded with one,and a few things that shouldn't be welded with a small 120 volt unit.The mm 130 xp was a nice little unit with .023 solid wire,and 75/25 gas.I just think wirefeed tracking is a bad idea on a welder with infinite voltage controls(mm 135/175).It's not too bad on a tapped unit,but I could live without it.The other Miller welders get much better without it,like the 185/210 models.So what it boils down to is it's the model of the welders I don't like,not the brand.