Well, you're limited with this for a few reasons:
1. It's flux core - which is one reason why you don't use it for Stainless. It would make a mess! FC is fine, but definitely not for fine work. I can't wait to get a gas cylinder for my Lincoln. It also doesn't show a fitting for gas to make it a MIG at some point, so you'd be stuck with FC forever on it.
2. It's Harbor Freight. I am NOT a snob - but you do realize you get what you pay for. With HF, you will be fussing with it to get it to work the way you need it to. I did a bunch of work for a horse boarding place nearby and that's what they had to work with and, yes, I fought it constantly. It worked, but it was a constant futzing with it. . . Will it work? Yes. Would you be much happier with a Miller/Lincoln/Hobart off Craigslist? Yes.
3. It's 120vac - the 3/16" max they give you is optimistic. 120VAC just doesn't produce enough penetrating heat to really do a lot. 1/8" (.120) Yeah and that would be about the max I would do with it.
Now, since it's only $110, it's not like you're putting out a ton of dinero. . . so it may be everything you need. Just don't go into it without knowing the limitations. You know?
I hope this helps.