Just bought a PC 7424XP and a set of Lake Country pads. Used it on my Titanium Silver 2001 540i Sport and was very satisfied. Then I used it on my wifes 2007 MB E350 Sport, Black/Anthracite with McGuires Deep Crystal polish and liquid wax. WOWEE ZOWEE!
I am now saving both of my elbows a lot of work and getting really professional results. People stop and stare and ask us what we used to get it so shiney and swirl free. Kinda leaves us with a good feeling.