I have the 305 and the sensor. The GPS works a treat, and has been my running/outdoor cycling watch for 2 years now, but I CAN'T get it to sync up with the cadence sensor! My team is on trainers for the winter, so it doesn't help that there are 30 bikes/30 signals in the room, but I couldn't even get it to sync outside of the class.
any tips? It has NEVER worked for me, but the lights flash and everything when I try to sync, so I don't think its dead. I'm tired of watching other people's legs for cadence and not having training stats to log!
'You can't always get what you want. But if you try sometimes, you'll find you get what you need.' - Mick & Keith