M.M.
I'm having it done 11/1 on my arms (in addition to a tummy tuck).
For me, I eat clean and work out 5 days/week. My arms have carried fat my whole life, that no matter how how I work, doesn't budge. Not with lifting, cardio....anything. Thus, the lipo.
When I spoke to my surgeon, and did all of my research...the bottom line is that if you are working out and dieting, and not getting the results you want, then lipo can do wonders.
But like the earlier poster said, if you don't have those good habits already, and continue with bad ones, weight gain will just happen in different areas.
The benefit to smart lipo is that there is very little down time (none at all, according to my surgeon), and bruising.