In general, the device suits me in almost everything, but there are three small drawbacks: the first is that the control unit is not protected in any way, at least some kind of cover was invented for it, God forbid you touch some kind of twist, break it, I think the repair will not be cheap, the second - plugs often fly off the twists, one has already been lost, and the third - when welding with a four with a 160 A electrode, it does not cook for longer than 5 minutes, it goes into protection for 10 minutes, although the maximum current is 200 A. For a professional device, this is somehow not serious. And everything else is great.