I wouldn't dream of selling someone one of those just for that, but it really will be good for thin steel if it has root-arc or pipe solution as they are super smooth in short arc mode.
It doesn't stop there though, ally, stainless, mild, flux-cored, self shield, MMA it does the lot.
Get it demoed well and it will blow your socks off, but it seems a shame to just weld up cars, unless they are something special?