I received this set from Vinnie. http://www.v-picks.com/FabFour.html

I've been using the largest of the bunch for a while and here are some of my observations.

They take a little getting used to. After decades of using regular picks I had to force myself to think about my attack differently. Once I did make a change the v pick is pretty satisfying in what I can get from it.
It's easier to activate the strings into motion. The attack sort of blooms along with the note. It's almost impossible to drop it. I don't have to try as hard to play. It does change your sound and I've only used it with an electric.

There are a couple of limitations for me but I find those limitations slowly easing away the more I use it. At first it was accuracy especially when string skipping. Strumming took a while to adapt to as well.

The thing I probably like best about it is that it gives me another tool. One that I can use for different sounds and to also break out of a slump. By switching back and forth between a regular tortex and the v pick it forces me to think differently about my approach to playing the guitar.