I'm eagerly awaiting the arrival of my Polar CS400! I had received the 200 for Christmas, but because I don't have internet at home, that wouldn't have worked for me as there's no other way to get the data off. I also wanted my heart rate measured in intervals, which the 200 didn't do (as far as I read). The 400 comes with the software, measures in intervals, and has an altimeter so I can see the hills, too. I wanna play with it!