I use macroline for the majority of the time because it is more adaptable than stainless...if you don't have the right length with stainless, you have to find (often buy) another piece and another till you get it right. With macro it's just measure, snip, bend, and it fits. However, macro can wiggle and wear to the point it leaks, then has to be replaced, unlike steel which stays in one place and doesn't do that. Steel is tougher and sometimes more attractive, but macroline is a bit higher flow. Those are the good points and bad fo each.