I have one Al Mar, a SERE 2000 with black blade. For the most part, the craftsmanship on it is exceptional, except that after a few months of just occasional opening/closing, it developed an odd problem in the action. The ball detent doesn't hold the blade closed w/out play anymore, and the lockup became weird. Kinda hard to explain. I tried contacting Al Mar knives and never got a reply. Obviously I haven't tried hard enough and it's just laziness on my part on not getting it fixed yet. Quality-wise, I'd rate Al Mar on a similar level to, but slightly below, Spyderco, though I've never had such a problem with a Spydie. In other words, Al Mar knives are pretty darn good quality, I'd say. Any company can have a lemon slip through now and then.
Even so, I never did EDC it. The thumb studs are too long and sharp, and it felt too blocky to EDC. There are some Emerson knives that haven't appealed to me (Commander), but overall, I prefer how Emersons feel in-hand over the Al Mars I've handled. And I like several of Emerson's designs more.
Jim