Garmin Forerunner makes you faster...
I've always been a fan of gadgets like the Polar HRMs and more recently the Garmin Forerunner 305I was recently out being a bit of a roadie to the North of Boulder, up I36 then East before taking some great backroads back down to Boulder. The pace was fine when suddenly I saw a message on the Forerunner telling me I had a low battery. So I stamped on the pedals and hammered my way back to Boulder so I would get back before it ran out - and I made it....
So they do make you faster....
