Also my experience. I chalked up the one mph difference as a rounding issue between the ACC and the speedometer, and I use the same technique. I haven't noticed the overshooting; maybe that's because I haven't yet experimented with the ACC operation in SPORT mode. I find the Clarity ACC rather different than the ACC on my CRV which uses all the same controls and should function the same. The CRV version detects a vehicle in front of me that's travelling slower than the target speed and matches that slower speed so smoothly that I sometimes find myself driving slower than I intended because I didn't notice the transition. The Clarity charges up to the slower vehicle and then actually brakes sharply to adjust its speed, a behavior I have never observed in the CRV version.