I suggest you watch the review video I posted.
I did and I don't see the value of it to justify a $100+ purchase. It's a few sensors that uses your phone anyway for the gps and data tracking features.
I don't care if you buy it because you think it would be useful for yourself. I just don't understand the appeal of all these fitness gadgets and data brown townytics. I think it's all more noise to deal with when all you need to start running/exercise is to go outside and do it.