I really like this knife, for several reasons: First, the nut driver is huge to me as a shooter. I sometimes forget my nutdriver and socket for my scope mount on a range trip (and if that happens and your mounts come loose, you just curse repeatedly, pack back up and head for the house), but I almost never forget to take a knife w/me anywhere. Second, I like the design. And third, Surefire doesn't make junk, period; it's all "good stuff".
That said, everyone here is exactly correct that SF is a little too proud of their stuff (a lot of their flashlights, too, imo, even though I own 4 of 'em). I think w/SF you do pay a premium for their name and logo, and it's even more true of their knives, from the other model (Alpha) I saw in person. I get the feeling they aren't marketing their knives to educated knife people but to gun people who are willing to pay them $600 for a light-grip-pressure switch combo for their AR, and think it would be cool to have a matching knife.
I want one, and I'll buy one, but only if I can find one at a decent discount, which I'm sure means I'll be waiting at least until 2011, and even then, may have to luck up on a babied used one. If I get one for the purpose I want one for, though, it's gonna be subjected to hard use.