All around the best workout tool I have used to date. I am definately a "gadget buff" so I have tried MANY other toys. The best feature about this tool is the ability to download your workouts to you computer to track your progress. I even use it when on a stationary bike or treadmill so that I can track my heartrate & download it to my computer.Gripes - I am not happy with the chest strap. I am 6'5" and workout on a regular basis so I have a fairly large chest. The strap is big enough, but I cannot find a happy medium when it comes to fit. No matter how tight I try to make it, the strap still tries to slide down to my waste as I breath in & out.I would also like the strap for the reciever to be bigger so that I could wear it on my upper arm. (too small even with the extension strap)The final gripe is that the GPS is useless in the woods.