I switched to a short shift kit and got an extended knob for track use. This knob is wonderful as a daily use knob. It's nice and low profile, has a wonderful comfort in your hand, and the extra weight helps you shift through the gates; however, on track I tended to lose track of where it was (once again, low profile. It's shorter than stock) and I don't drive with gloves so if my hands got a little sweaty I would sometimes miss the knob or slip off of it. Minor gripes, none of which ever happened on street use.
Review here:
TWM 7" competition shift knob review