I hadn't actually had a chance to use the Wetronome in the water before I slipped it under my beanie during one of my Ironman training runs. The Wetronome is a great product for focusing a triathlete's attention on their running cadence, which tends to be reduced after a hard bike ride. With the Wetronome this becomes easy as programming the unit and following the beep.
The Wetronome® encourages "muscle memory" for performing your sport at a particular pace.