That Miller 211 is a nice unit.
I have a Lincoln Power Mig 140C and it suits me perfect for the body work I've been doing on my 1972 GMC. I can fine tune my heat and speed settings without preset "clicks" on the knobs. That's the main reason I bought it.
This is the first time I've done sheetmetal repair work as well. With my MIG I try to keep a gap far enough between panels for the weld to penetrate both panels, so when I grind away some of the weld, there will be strength in the weld. But I'm still learning as I go. So my welds are looking better since I started.
Gary