I have run the Passport from 110v house current and generator 110v and it welds really good. I have not welded a lot with it because I just got it, but it has surprised me with the really nice practice welds. I just started welding this year in class and I am use to the larger Miller MIGS.
I am using the small bottle of CO2.
You can buy the paintball 12oz CO2 bottles anywhere they sell paintguns, Wallmart, Academy etc... Academy Sporting Goods fills the bottle for $2.50. I am still on my first bottle so you can tell I have use the machine less than 20 minutes.
I have ordered another roller for the flux core wire. When I use flux core I will reverse the polarity by changing the ground.
There seems to be a lot of interest in this new versatile machine and I hope to weld more with it very soon to give a good comprehensive report. Bob Skurka is also getting one this week and he might start using his more and sooner than me. Keep an eye on his post below in related topics.