I've probably tried few hundred picks in my life and since I'e started using this one, I can't use anything else. It's just an amazing pick, with awesome grip and awesome feel. I would highly suggest it.
Another of Dunlop's newer signature picks, the Petrucci Jazz III is unlike any Jazz III (or pick, for that matter) that the company has released before. A black pick at 1.5mm thickness, the Petrucci has beveled edges for faster play, and a rougher grip area to achieve stability when holding the pick. Although pretty cool, it's not exactly my cup of tea, but I still have it in my tin of pics and will use it from time to time.
I used Dunlop .88 guitar picks almost my entire playing career. I forgot my tin full of picks that I usually throw in my guitar case at home when I went to the studio. When I was at the studio another studio guitarist had some on hand, which he handed me the John Petrucci ones. Ever since that day for the past two years I have bought nothing but these guitar picks. I went to guitar center after that day and bought five packages of them.