I got a Polar HR monitor a couple weeks ago...F6 model...it is probably one of the best investments I have made in quite some time. It does a great job of tracking my HR during/after workouts/calculates calories burned/tracks workout time in target hr zone/real time alerts for when you fall out of the target zone/etc....the real-time feedback is very encouraging, and definitely helps me keep a positive attitude about training during training. I constantly found myself second guessing my intensity during cardio, "am i working hard enough?, am I working too hard?" This device will definitely help answer those questions. I know most cardio machines have HR monitors, but I have recently found that the readings from my HR monitor are most of the time, higher then what I would see from the HR monitor of the equipment--which could be a good or bad thing, depending on the type of training.. Just thought I would provide a little feedback on the purchase, it was a pretty entry level HRM, only $99.....if anyone has any questions, feel free to post.
-Cy