I have been using a Cobra for many years. Like Glenn said, not for everyone, but once you get used to one, it's hard to bowl without it. Have tried a couple others- Storm, Ebonite, but always come back to the Cobra. Never tried the Cobra 3 however. They're durable and last a long time. I have a NIB size Medium I'd sell for $20 shipped if interested.
Spike
