"Sticky" I think is the word that best describes them. Balls tend to come to nearly a dead stop sometimes when they hit the flipper. I put them on all three of my games and will try them out for a while. I was told that after some use, they would lose their stickiness and that they are a bit sticky when new (something to do with the manufacturing process).

For me, they seemed to improve shot accuracy. I found that in BoP, for instance, I was able to hit the heartbeat ramp at will (even more so than normal). My daughter's previous high on that game was around 8 million. Last night, I saw her get several scores over 10 million (one of 25 million), and she was so excited to keep scoring the unlimited millions from the heartbeat ramp.

I like the idea of a long-lasting, easy-to-clean flipper rubber, but if it gives me a false sense of being a better player, I don't know if I like that. Like I said, I'll leave them on and see how they react after they've gotten some use.