I love my Garmin 205, I've run several marathons and halfs with it and it beats having a footpod to deal with. I've recently starting training for tri's and the quick release mount/wristband works perfectly. My only complaint is that it can take a while to hookup to the satelite. You definitely want to turn it on before you get to your race site. I'll be upgrading to a 305 or 405 soon to start tracking HR and cadence.

I love this device. It's been nothing but reliable, and has gotten me through an entire year of running without sign of letting up. The battery stays charged for several runs, although there isn't a great way to tell how much battery you have left.

Other models have better bike integration, and even HRM capabilities, but for the money, this device is a great value. There is a feature for multisport detection based on speed, but I have never used the feature because I prefer to just rely on my conventional cycometer.