I recently signed myself up for Strava because I want something new to track my data. I used to use Running Ahead but that website isn't keeping up with Garmin connect changes. Annoying, but it's a new year so I'm okay with switching to a new platform. My only complaint so far is that I can't add existing mileage to my sneakers, which I can do on Running Ahead. Those red Brooks Adrenalines have like 2 plus 280 more miles on them.
Strava seems pretty easy to use. I connected my Garmin Forerunner 305 to Garmin Connect and synced my Garmin Connect to Strava. The Forerunner 305 is a pretty old model so it doesn't sync wirelessly, meaning that I have to connect it to my laptop to add any new runs to Garmin Connect/Strava.
The coolest thing I've noticed about Strava so far are these segments. Apparently there's something called the Floataway Quarter Mile (there's an office community called Floatway right near my box) and Strava automatically gave me some stats on my performance.