M101 is incredible, it finishes down better, works longer and doesn't dust as bad as M105. It definitely makes chasing those deeper RIDs easier too. It is mostly used as a D300 or M105 steroid, but it can be used solo. I found that when using it with the PFW pad, it leaves more haze, but using it with LC Cyan pad it left an amazing finish. you can go straight to LC black and 85rd( or preferred finishing polish) Surbuff+M105 is a MONSTER, MF cutting pads are good, but only on some paints. and the new OPT MF cutting pads are good with it too. I'll be posting up a Jet black 335i write up that I used the M101 along with the CSC (Charlie Sheen Cocktail) Lots of WINNING! M101+Dynabrade = "Doing it Big"