I have used Garmin GPS for my running since they came out with the "brick"-- Garmin101 more than a few yrs ago. Found it to be extremely accurate most of the time. I have used my 305 while riding a few times and noticed that the Garmin shows more distance than the wireless on the bike. More times than not--when I stop and stop the watch I forget to push the button to start riding again so it makes my tests useless. I know there is a pause feature with the Garmin--just haven't programmed that in.
Jeez, a lot of words for a simple question: GPS more accurate than wireless bike computer? Thanks for your responses. Nick