I have had, for a while, a wireless Planet Bike Protege 9.0 that's been awfully reliable. Before that I had a wireless Cateye that broke due to a heavy impact. (Not a crash, just careless tool use and storage.) I recently decided to get a Cateye Strada Cadence.
For about a month it was great. But now, every time I go over rough enough surfaces, the computer quits receiving data. Sometimes it starts again, sometimes it doesn't.
I've QC'd the installation a half a dozen times. I've changed the battery. Near as I can tell, the problem is the contact points between the computer and the wire base. The contact is very light, and bumps can disrupt it.
Funny how my wireless never flinched at rough roads, or had weird wiring issues. I'm going to take this thing back and get a wireless without cadence.
Just food for thought. I've experienced (very rare) signal interference with my wireless, and I've had to change the transmitter batteries...but the wireless was never so delicate a system. This wired computer has given me a host of problems.
The question that I'm certain someone will ask is: If the wireless Protege was so great, why aren't you still using it? I am...just one a different bike. Come to think of it, a bike that sees way more abuse than the nice road bike I put the Strada on...