"It's fun and motivating, but not accurate."3.5 starson by monsterjta
Pros: This is a fun device, and motivates me to run. I like the online tracking features, and that it can upload runs to Facebook. It's easy to use.
Cons: It's not accurate. I run the exact route most the time, and each time the distance has deviate approximately 10-15%. For distance runners, and if you are at all serious about running, this is a big deal.
Summary: If you're a moderate runner, and you aren't concerned about accuract, this is a fun product and will probably serve you well. If you're a serious runner or you demand accuracy, this is not the product for you. There are GPS wristbands which will be very accurate for the serious runner.