Markwrote a review of Garmin Forerunner 310XT GPS on February 13, 2013
Familiarity: I've put it through the wringer
I really liked this watch. Especially since it was only $250.
I used it for running mostly, and the bike and swim features were also used for my triathlon training.
The only bummer about this watch is that the swim isn't what I thought it was. It doeesn't keep track of the laps indoors at the pool and has a tough time tracking even outside.
In summary, it's a great watch for the beginner triathlete who swims outdoors, however, if you are doing advanced training, you will want the features of the 910xt. Spend the money