Out of the bag these sound a little muffled so i bevel them cos it reduces string resistance and improves the tone massively. They play and sound great on both a steel string, playing fast lines and on my hagstrom jazz box. Bit slippery in the hand tho. I measured them against the Jazz iii Dunlops and they're roughly the same size so it isn't a big shift. I recommend bevelling before playing (as classical guitarists d with their nails) as it improves them twofold!
I actually thought this pick was supposed to be of a larger size than it turned out to be, but no matter. It feels great to play with it (them?) and the thickness (thinness?) is perfect for me. My reason for giving durability only 4 stars is that I haven't worn one of them down enough to know how long they last. Anyway, if you want a good pick buy this one.