I've been using a Sigma 1606 for a couple of months now, my first wireless computer. I've noticed that when I accelerate from a traffic light that sometimes the mph doesn't register for several seconds, nor does the trip mileage change. Then the data has been processed and the speed is indicated while and mileage recording. The mileage will take a jump ahead anywhere from .02 to .08 miles. Apparently, even though the speed is shown to be 0 mph, because the bike is moving it is already recording the distance. Does that make sense?

One thing I like about the Sigma is the size of the fonts, much easier to read with bifocals than my previous Cateye Astrale.