I don't have that machine and don't have experience with a TIG at all but I do have a Thermal Arc Fabricator 251 MIG and really like the machine. It's very powerful but can be adjsuted down to work with thinner metal as well. I bought it used and have had zero issues with it besides the liner so I feel the quality is very good. Again, not specific to the machine you refer to but more in general for Thermal Arc... hope this helps.
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
Short clips: Goodguys Pleasanton autocross and pit videos
Threaded Mode