Gasless works just fine.
It runs alot hotter so is useful for doing the more heavy duty stuff as you get better weld pentration.
The wire is not cheap and you have to clean the slag (Deposits off the weld after but they will look as good as one done with shielding gas.
You can get some good deals on the wire on ebay if you look around.
Did you know that the way to make a Gas only mig welder into a gasless one is to swap the earth and positive lead (Welding torch and earth clamp . Not the mains plug)
Earth clamp to positive and welding torch negative.
Thats the only difference other than the wire
