Bests & Worsts Reviews from Amazon

I bought a new heart rate monitor and this transmitter came with it. I have had to replace the battery after about 9 months which was no big deal. Since than I have had so many problems with the transmitter stopping in the middle of a run. I have replaced the battery so many times that the cover now is stripped which means I have to replace the entire sensor since Polar does not just sell a cover. I would probably not buy another Polar. I am disappointed in their lack of reasonable support of the product. I thought having a replacement battery was a positive however the design flaws make the device unstable after the cover and battery is removed.