the slide sock is the best investment i ever made. the amazing thing, at least for me, is that it seems to adjust to the approach. sticky or slick, it adjusts and after a few shots in shadows i am fine. i often see bowlers around me using brushes, ez slide, changing soles, whatever and whining about the approaches to management, and i just keep bowling... i bowl with my pro shop guy in a league and tournament (tenpinspro) and he has witnessed my ability to slide. i have yet to bowl in a center where i have had a problem (even the notorious stadium in reno).