The Good: Whats not good about the CT-4.2? Park Tool USA hit the nail on the head with this chain tool. With huge grips all around, your fingers are not turning purple and hurting while your trying to bust through the toughest chains. Along with great styling, you get replacable pins for long lasting life of the Park CT 4.2.
The Bad: Only bad is its not 100% universal while not excepting wipperman chains.
Overall I think all who wrench need to purchase this tool, or at least borrow it from you local bike shop to see what im talking about. CT4.2 all around is the money spot.