Any welders on the board?

What is the down side of flux core, other than the clean up needed afterwards ? I'm not a welder but the only welding i've ever done was with a flux core wire. Seems easier for a beginner like me.Also it's just easier to carry around w/o that bottle. I just bought a Lincoln wire welder (flux core) that I can get the conversion to gas for.It's another $100.