So far so good. They are pretty much dead silent and can be used to practice in a quiet area (aside from the accidental rim hits, but the heads are quiet as can be). I'm using them with Ddrum triggers and they trigger fine. Nice rebound, a little bouncier than regular heads. I've hit them pretty hard and no damage yet, but I doubt they would last as long as real heads at maximum force. They leave the tips of the drumsticks black, so their color does rub off a bit with each strike.All-in all a great, affordable solution to practicing with your real kit as well as using them to trigger a drum brain.