I have the 255EXT. I only use it for tig, never plan to use the stick option.
I haven’t used any of the advanced settings. I just run it pretty standard and I think it runs great. I’ve welded aluminum, stainless steel, and mild steel with it. For the money, I don’t think you can beat it.
I would like to eventually get a cordless pedal. That fucking cord is always a PITA.