I have never used one of these machines but on paper they look very good. We have just got a miller MPI 220 Which so far is excellant! It is a bit more money than the thermal arc 211i but you also get a pulsed mig process. Do you need a multi process machine or just a Mig welder?
Iv never used the a thermal arc mig, however I do have a 161s dual voltage machine for outdoor work, the build quality is excellent, and the technical support is very good, as well made as ESAB, I would defiantly recomend the brand