Bought two them.
I tried all the JazzIII available. After 10 years playing the JazzIII (small) Black Stiffo, I finally switched to JazzIIIXL stiffo. I just love them. I had a pick attack twice more powerful than regular JazzIII. My guitar rang so well after I mastered it. I meanwith this pick I had a picking Gain (amount of distortion) increased by about 20% !! Before I needed a gain of 8/10, now I am more at 6.5/10 !!
Petrucci picks :
Pros :
The dimension are quite the same as JazzIII XL (only 2mm smaller), so I can I felt instantly at home. Also the chops were easier to play (arpeggios and all this sherdding shit)
Cons : the tone. As I think it can be a nice upgrade for small Jazz III players and even for JazzIIIXL red nylon players, for people like me who use to JazzIII XL stiffo, it is a step back for the tone. I mean it is brighter (no stiffo for the JP pick), and as I prefer the tone over the easy sensations for shredding, I finally kept my JazzIIIXL stiffo. These f**king XL stiffo pick have for me THE TONE !! Without any doubt the secret of my tone... However I would rank the JP pick in 2nd position just before the JazzIIIXL red (nylon).
My 2 cents