Don: I've seen them around, and I may have actually played with one at some point, but I prefer the Benchmade kit, since it is slim and clips to the pocket. But the bits were pretty pitiful, so I bought a few bucks worth of Wiha bits, and replaced the originals. Usually, when shooting, I bring a 'tackle box' with tools and cleaning supplies, so size isn't an issue, but if I was travelling light, I'd definitely look at something like the Lyman.
Plus, people mistake the Benchmade kit for a pager, most of the time, so it's one less question that I have to answer ("what's that clipped to your left pocket?" "pocket knife" "well, what's that clipped to your right pocket?" "another pocket knife" "why do you need two knives?!" "who said I only have two?" etc)
--JB