Originally Posted by Merriwether
There are many threads on GPS units as alternatives to cyclometers.
Some brief things to bear in mind, though: GPS units lose contact with satellites occasionally, whereas cylcometers keep constant measurements. GPS units tend not to tally the wiggle of your wheels as you ride-- the unit straightens out your path in calculating your distance so there is about a 1% error compared to a well-calibrated cyclometer. GPS units eat batteries. Cyclometers do not.
Very true.
IMO there is not a big point of having a GPSr on the handlebars in case you're not interested strictly in navigational features. For speed a wireless cyclometer will do fine.
I also use a Legend, btw.