If you are bowling on anything above mediums (medium-heavy to heavy oil especially) the strongest reactive in the Track lineup is the Rule. If you wish to use it on a variety of conditions I would suggest polishing it, as I know people who left it in box condition that get frustrated that they can only use it for a game or two while I can use it most of the night. I love the fact that like most Track equipment, the Rule is easily managable to hand release changes as well as playing different parts of the lane adequately.
Matt
