I'm sure this is a great item, if it works. I've been trying to get one that does over the last five weeks, but have not succeeded yet. The first one I bought didn't work at all, so it was sent back to the Polar repair shop. Once I got it back it worked, but now it didn't register heart rate (something that made me wonder whether the folks at the repair shop actually test the items they send back at all). So I switched it for another computer (which I received after another week). The new one registers heart rate, but not bicycle speed/distance. It doesn't upload data to my PC either. I have tried to contact the local Polar service center via phone and e-mail, but no one answers.