They are Chinese but I gather they're ok. One of our members has one, Simon718, he bought it a while back from Weldequip though they're not currently listed in the shop.
I thought they were Italian! I had one years ago ac/dc tig. It blew a resistor or what we reconed had happened they would not give out a diagram to check what had blown cost £240 for a PCB, replaced that and sold it on as had to get another welder while the PCB was sent out took an age, think it lasted another couple of years welder was ok but $hit back-up.