I'm looking to start tracking my speed and cadence for my iOS app, Cycle Meter. The app works great for distance, time, but is not accurate at all for measuring my speed.
So I'm thinking of buying a Garmin or a Wahoo speed/cadance sensor and wanted to get the community's opinion on the two. I'm not worried about price. More about quality, functionality.
The two in question are:
http://www.wahoofitness.com/Products/Wahoo-Fitness-Premium-Speed-and-Cadence-Bike-Sensor.asp
https://buy.garmin.com/shop/shop.do?pID=1266
Update: been using the Wahoo one for a few weeks now and have to say that I'm very happy with it. I've been in a lot of rain as well with no issues.