On another forum the megs rep said the product was developed for heavy cutting and best worked a long time to give it the chance to do what it was designed to do. It sounds like it was designed to do what most AIOs don't do well and that is to really cut well and also to be better in the longevity area. I've read several posting comparing speed with this product and speed still finishes better which I can believe. I think speed finishes better than HD polish does. It just looks outstanding imo.