I'm another Garmin user. And like some of the others I also have a speed and cadence sensor. Linking the Garmin and Strava accounts is very easy. In fact I like the way my Garmin works so well, I bought a Garmin Edge and it can read HR data from my Garmin watches for a little more data.
Also with Garmin (and possibly other devices like Wahoo) you can turn your lights on automatically when you start a ride which I like.
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"One of the most important days of my life was when I learned to ride a bicycle" -- Michael Palin