So I just went out and got this Garmin Foretrex 205 to help me with my multi-sport training program. I strap this baby on my wrist, climb onto the treadmill, and start jogging. The machine says I'm doing 6 MPH, but the Foretrex isn't registering ANYTHING. So I think, yeah, this is a pretty pricey device, obviously made for experienced, intense athletes, it probably hasn't been designed to record such slow times. So I kick the machine up to 8mph--still no reading. 10 mph--still no reading. 12 mph--nope. I notch it up to 15 mph, which is as high as my treadmill goes, and still nothing.
So I jump on my bike, attached to my top of the line fluid trainer. I start spinning, and the cyclo computer is reading 18 mph, then 20, then 28--and this stupid Garmin Foretrex is still reading ZERO MPH!!!
What a piece of junk! Obviously NOT made for the serious multi-sport athlete. I highly recommend you not waste your change on this toy.