Been riding a 2008 ZX3 for over 20 months now and it's been superb! I'm a tall guy with a decent amount of power and the frame is stiff without being punishing, and it's light for the size (61 cm frame). Customer service from PF has been excellent (rec'vd new seat collar as a courtesy when the original collar spec'd with the frame was deemed less-than-safe, and an order of replacement derailleur hangers was simple and quick). I wouldn't hesitate to buy again.

I'm running an Easton fork, so I can't speak to the ride quality of their house-brand fork.