This is an old model of Garmin's very popular midrange GPS watch for runners.
It has a very good reputation review here but its an old model. Since the FR210 came out 5 years ago, Garmin has added 2 significant features to newer models: bluetooth (FR 210) & optical HRM (FR225).
I've decided I'll wait for the FR225 to get cheaper (currently ~$350) before replacing my old Polar.
Apparently the FR225 optical HRM performs well running) but $80 is a very good price for a FR210 - $200 was a deal 2 years ago.
brace yourselves, COTD deals incoming