I've tried using these a couple of times in the past and never really dug them. I've always been a green Tortex dude. Recently (mostly due to laziness) I've been using the only pick that's been within grasp; a Jazz III (black, in case they're colour coded for thickness) and I'm starting to really dig it.
I really like the attack it imparts on the string, really like the raised logo on it (helps with grip), like the texture and the shape, and the 'nose' on it, but I'm not too keen on its size. Just a little too small for me, and with my weird and constantly mutating picking style, I find my index fingernail is frequently getting caught under the high strings.
What's out there in the Jazz III world? Are there slightly larger versions?
I always find myself going back to the black Jazz III's. It's just really the only one I feel comfortable with. I also used to use the purple Tortex picks long, long ago.
There is a tortex version of the Jazz III that is "slightly" larger, and by slightly larger I mean almost the same size, just a little bit bigger.