I haven't ever really warmed up to the PM2. I trust the strength of the compression lock, but it's unpleasant to use compared to other stout, reliable lock mechanisms (e.g. axis lock), and the weirdly huge size of the knife for how much blade it provides is off-putting as well. It feels great in the hand to cut with, don't get me wrong, but I can't see why I'd ever carry when the Benchmade 710 is the same size in my pocket and provides an inch more sharpened steel.
Different strokes for different folks. It's a very nice knife, and I understand why other folks might love it. I don't get the hype at all, though.
That said, I love Spyderco and carry one of their other knives pretty much everyday.