My wife bought me a Polar F7 heart monitor for Valentine's Day! I've been wanting to get one for a few months, and I love it! I use it for all my workouts and it is great to see how many calories I actually burn and what my heart rate max and averages are. I really like the fact that I can upload my workouts from the watch to an online website.
Now it is time to think about starting the TNT Diet. Might take the next challenge off to make sure my body adjusts to the new eating habits. Or I could use the challenge to help me work my way through it. Haven't decided yet.