The Jazz III was my first step on a multi-year quest for the ultimate guitar pick. Seeking a combination of thickness, grip, tone, and precision, I tried all sorts of exotic shapes and materials - V-Picks, sarod picks, Wegens, you name it. My best luck had been with agate picks (mostly Stoneworks). The glassy-smooth edge spoiled me, and the tone was as decent as I could find for really hard picks. But I lose picks, a lot. Losing a $25 pick is a bummer, man. I even broke one onstage! (While covering a friend's song with him in the audience. I gave him the broken halves, and he cherishes them.) And they're not super-grippy, and they're a little clicky, and the 2.5mm thickness I like lacked precision most times. My last shot was Wegens, which are great except that they're about as wide as a spare tire, and are really hard to play accurately due to the thickness. Plus the edge isn't smooth. Sigh. Back to the Jazz III, in desperation. I found one of my old Ultex ones and loved how tight and precise it felt, and it was thick enough and grippy enough to be comfortable. I got some Eric Johnson signatures as spares, but didn't like how the nylon edge shredded up (my gripe with all nylon picks). While EBaying for some replacement Ultex, I found a couple of new Jazz IIIs... the new 2.0mm, and the Petrucci Signatures, both in Ultex. What the heck, bought 'em both. So long story short, I just had a pick bake-off downstairs with the regular Ultex, the Eric Johnsons, the 2.0mm, and the Petruccis. And the Petruccis mopped the floor with the other three, for both tone and pick-on-string feel. I was genuinely surprised at how different they all were, and what a wide margin there was. The Petruccis sound warm - not as warm as the 2.0mm, but much warmer than the others. I often play pick + fingers Richard Thompson style, and the Petrucci came closer to the sound of my fingernail than any of the others. And the highly polished surface made a smoother attack - something I've learned to appreciate from stone, and despaired of ever finding in plastic. Of the others, the 2.0mm was the warmest, but not as comfy as I expected. The Eric Johnsons were most articulate, but had a dry tone I didn't like. The old Ultex was the best all-arounder with the best grip and second-best tone, but the tone and feel of the Petrucci put it well in the lead anyway. Now I just gotta buy a hundred more and see if I lose them all before I decide to go on some fool quest for a better pick again.