I have had really bad luck /experience with the current Garmin Ant+ bike speed sensor, paired to teh 935 watch. I currently have 4 speed sensors in my arsenal :)

I have debugged, with Garmin tech support, doing everything from updating watch firmware to deleting file folders manually through PC, to replacing batteries, to using Vaseline on the battery (per Garmin support), to trying a separate watch (my son also have a 935).

I can always get it to work somehow eventually but it is completely unreliable. Once I had to give up and then half way through the ride the 935 suddenly picked up speed.

I am getting very good at navigating the watch, but I really would like it to "just" work as my footpod does; I connect and pair it once, then it just works.

With the bike speed sensor, it might work once in a rare while, but typically I spin up the bike, start the indoor bike mode, and then the little speed icon flashes on the watch but it does not pick up speed. When I get tired of watching the wheel spin, I will go in and try to connect to the sensor again. Sometime it will connect, often it will say "try again" and I try and try and it might pick up eventually, it might not. Then I will remove the sensor from the watch pairing, then search for sensors again and it might find it, it might not. Then I will remove battery. You get the idea.

I just cannot believe that the quality of the speed pod is so bad that all 4 sensors I have are defective, or that I have 2 faulty 935 watches (and they pick up running sensor with no problem).

Any ideas? I am close to just buying a different brand of speed sensor. Any recommendation for a different sensor? Or ideas of what can be going wrong? I do not have any interfering wireless stuff in the area of my bike trainer. Treadmill is in same area and footpod works perfectly.

Thanks!