Improved acceleration up to 30 mph, but does suffer from belt slap at idle. After running for about a month I changed to a stock fixed drive half of the variator,which stopped the belt slap and improved mid range torque. Acceleration up to 60mph is improved and tops out at 65 on the flat or 70 mph slightly downhill.
With a polini 15% torque spring and 14.5g roller weights I've gotten the best results. Great around town and on longer rides.