I have one of the original Leatherman tools, which was the weapon of choice for film guys. Actually, there were two camps, the Leatherman guys and the weirdos who preferred the Gerbers, but the Leatherman seemed to have won out overall. Gerbers are for little girls who just want pretty things.
When the Supertool came out, I bought one, and I've used everything in it (including the "bone saw"). I carry both in my truck, the original in my run bag and the Supertool in the EMT pouch on my pistol belt. I carry two because sometimes you need a pair of pliers in both hands (heh heh). I also have a Micra that I carry sometimes, but it has a problem and needs to go back (to take advantage of that lifetime guarantee).
I liked them all so much that I bought more of them as gifts for most of my family. My mom used to keep the Leatherman Mini-tool I gave her in her purse, and she found that she used it often. I believe my dad bought extra ones to keep in his various vehicles.
I'll probably eventually buy a crunch, but the original and the Supertool are so damned good I don't have a pressing need for it.
Here's the guy who created it:
Tim Leatherman -- proving that deep down, everyone loves nerds.