I gave my girlfriend's son an M16-13 and a Mirage Wharncliffe for use in his job at a moving company. Both knives have seen very hard use for months, with no failures of any type. Both knives lock up extremely tight still, but the Wharncliffe seems to take and hold a better edge. His co-workers had me acquire a LUS-11 and 12 for them and they also have held up very well.
The bead blast finish of the M16 blade has suffered quite a bit of wear and "spots" developed soon after exposure to southern states humidity. No such problem with the satin finishes of the Mirage and LUS knives though.
Handles of all the aforementioned have held up extremely well and still look as if new. The blackened clips of the M16 and Mirage look beat, but the teflon coated clips of the LUS's still look new.
Overall, I'm very impressed with the value presented by each of these CRKT offerings. However, they still haven't replaced my personal favorites - Spyderco's Delica LWT, Standard G-10, Rookie G-10, and Calypso Jr LWT.