Great product at this price.
I only did stick welding for now, 8mm thick steel plates welded to a 75x75 5mm wall post to make brackets for ridge beams and underperlins. Didn't overheat in the time it took few brackets to weld.
Amps had to be cranked to near maximum, using 3.2mm electrodes so there wasn't much left, in case anyone would want to use thicker ones.
On the negative, MMA welding cables are short, and this was pointed out in a few reviews. The other issue is the MIG wire thickness - it accepts 0.8mm, which is standard, but does not have an option for 1.2mm, only 1.0mm. 1.0 doesn't seem to be too common but I'm not a pro so I didn't visit any welding supply joints, just Bunnings and Sydney Tools. Neither had any in stock. I'm not sure if it would be possible to feed 1.2mm on 1.0 setting. I'll try.
All in all, great purchase for anyone doing some serious DIY, I think. Again, not a pro.