I used my Approach S60 last summer. This past fall I bought 6 CT10 sensors. Today I attempted to pair them to my watch. Followed all instructions and even worked with the Garmin support via Chat. Was asked to download Garmin Express. Did that. Downloaded updates to my watch (1 later) and attempted to pair sensors again. Still not being found. Why? SO frustrated with this product. Why would I need to download updates from a Garmin Express forcing me to own a pc (that I don't and had to borrow one)? Why do the sensors not find my watch? Looking for a exchange of these CT10s or full refund for faulty product that just seems to be way beyond Garmin's skills and abilities at this time. Maybe in 5 years they can figure this technology out.