Having used all three generations of Griot's Machine Polishes and all three (or was it four?) generations of Griot's pads (still have samples of 'em all) and the BOS, my $0.02 is that, with the possible exception of MP#3, you can do a *LOT* better. Only thing I like about the MP#3 is that it came in handy on a super-soft repaint that was too soft for stuff like #80 but still needed correction.
If the simplicity of the Griot's approach is appealing, you can still use their orange polishing pad and red waxing pad with a PC (or even with a rotary). The pads do last forever but the orange one is a bit mild for major correction despite its porosity and firmness.
Heh heh, using Griot's MP#2 with the Cyclo and its green pads really opened my eyes regarding the limits of the PC when equipped with Griot's 6-6.5" orange pad! With the Cyclo the MP#2 did some *real* correction that I'd never got it to do with the PC.
Not sure how the handle on top of the polisher would be all that much better/different from just using theh PC with no handle at all (holding onto the housing) :nixweiss Heh heh, if you want a top handle random orbital, I'd look into a Cyclo

Talk about simple, the Cyclo only has one speed and most work can be done with polishing or finishing pads just like with the Griot's system.
Note to newbies: despite the above ~slam I'm a big Griot's customer/supporter, I just don't like the above-mentioned stuff.