I love this knife and I love GIN-1. I carried one for over a year until my Leatherman Wave made it seem a bit redundant and I gave it to a friend. The Blade size and shape make it relatively people-friendly while retaining the ability to do most folder-appropriate tasks. Some folks don't like a combo edge, but I found it pretty handy, and it's hard to beat a clip-and-hole setup for easy, fast deployment. GIN-1 (formerly G-2) is a very flexible, corrosion-resistant stainless that has decent edge retention. It doesn't hold an edge like ATS-34, but it's far less brittle and much easier to sharpen - a great steel for folks that actually enjoy the sharpening process. I don't want to give you the impression that it goes dull like 440A or AUS-6, though; it's a premium blade steel and I'd take it over 440C or AUS-8 any day. GIN-1 used to be the Spyderco "standard" upper-grade steel the way ATS-55 is now, and it was used on a few Benchmades as well. I haven't used ATS-55 much yet, but it better be darn special to warrant replacing a steel as fine as GIN-1.
The only bad thing I'd say about the Pro-Grip is that it has a darn pricey retail for a Zytel knife that size. That's basically because it has all the "bells and whistles" - clip, hole, Kraton inserts, and a very good steel. I got mine for $40 and I've seen less, though - at those prices it's a beauty.
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-Corduroy
(Why else would a bear want a pocket?)