I've been playing for 40 years. At this point, I've acquired some really nice gear. I never thought something as simple as a pick would improve my playing, but they have. My speed, accuracy and tone are infinitely better. I've played the Dunlop Tortex .60 mm most of my life. I still use those for acoustic guitar. I Love the rough ground edge of these Chapmans. I can twist the pick slightly, dig in and get a gritty, percussive sound. I'm a customer for Life. Don't discontinue these. BUD... In Virginia...