We purchased eight of these for a year long company walking competition. We are extremely pleased with them.Pros:Battery life - The batteries lasted all year, even with frequent walking and checking of monthly totals. (update: Now had it almost three years and only changed battery once.)Accuracy - I've tested it many times for both walking and jogging. For walks/jogs of more than 10 steps, it is very very accurate. It works well positioned at the hip, in the pocket, in the purse, in your palm (while jogging), or in other positions other than right in the center of your body.Accessories - Something for everyone.30 day step log - The previous 30 days of activity (daily and total step counts) are shown. This is perfect for an office walking competition.Small sizePrice - very reasonable!Durability - I've dropped mine in puddles, I've bumped it into things in the woods. No issues.Quality - No issues in almost three years of use.Cons:No USB, Wi-Fi or other such connectivity features.Doesn't track stairsNote: The pedometer starts tracking steps when you start moving, but doesn't count them until you have gone 10 steps. So if you walk only nine steps and stop, you get credit for zero. If you walk 10 steps and stop, you get 10. If you walk 11 steps and stop you get 11... This is probably some type of battery saving mechanism. I'm fine with it because under 10 steps, you don't get any cardio anyway.