This is a real handy device for those who do not like to train in groups but still want some competition during their training/work out.I waited for some time buying it because there was no Mac support. However now that that is available there was no need to hold off any more. The device has so many function that I am still trying to find out what I can do with it. Fortunately the many discussion groups give a lot of support in that matter.There is one thing that is a bit of a down point and that is the length of the straps. My wrists are slightly bigger than the average one and I  can hardly close it.In any way from now on I have a very strict trainer that tracks all my actions. 

Question: What opinion do you have about the battery?
Answer: need to hold off any more