i have the polar f11. i really like it. i got it back in january and its kept me modivated bc it gives me a program to follow. tells hr, hr average, hr max, calories burned, and keeps a diary of the last two weeks i think. its also coded so you don't pick up anyone else's hr.

though now i'm borrowing one of the garmin forerunner 301 it has a hr monitor with it instead of just your speed and route. really like that. i usually use the old garmin with no hr monitor and my f11. i just look like a dork with all the gadgets on my wrists.