Do you have one?? What are you thoughts?

I've been looking at the website forever now and trying to decide if I really want it and if it'd be a good idea for me. I'm not sure if it'd work for what all I'm thinking of what I'd use it for.....like when I'm at the gym with doing weights or the elliptical where it wont pick up my steps.

What do you think?? Honest thoughts on this would be great.....the pros and the cons!

Thanks!!