I've heard nothing but good stuff about this, but I don't believe that there is a defiinitive "best" when it comes to paint care. So much of it is in the technique used when working with a given product. I've found some polishes like a more aggressive pad, lighter pressure or slower speeds on the machine, others work better with a different combination of pad, pressure and speed. I've experimented with a bunch of product lines on a bunch of different kinds of paint.