I have the TWM with the weighted knob. Can't compare to kartboy or b&m, but I like it. It makes it a little harder to get it into 1st or 2nd, but it just takes some getting used to. 5th gear seems really far away now. I used to basically slide the stock shifter between 4th and 5th, the TWM short shifter forces you to concentrate and make an accurate shift. If nothing else, I promise you that you will never wonder what gear you are in or whether or not the gear is actually engaged ever again.
I realize this might sound like a lukewarm review, but to give it some perspective, I was horrified by driving my sister's '99 Corolla. And I only had to move it out of the driveway. Everything just felt wrong. Part of this might be driving a car I'm not used to. Since I don't have extensive experience with it, I don't want to go nuts trashing it. I can definitively say that the contrast with the TWM shifter in my '02 ES Protege and the '99 Corolla was ridiculous. In the Corolla I had absolute no idea what gear I was in or whether or not it was engaged. I just had to hit the gas and keep my fingers crossed.
Bottom line: I definitely recommend the TWM, especiall if you are installing it yourself.
