Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: A good product, but you might do better.
Review: I trained for a marathon and several 10K races using a heart rate monitor. They are very good instruments for training and I recommend them to everyone who wants to lose weight or get in shape. After you've purchased one or two of them, you become a better shopper. I purchased an F-4 for a friend, and I was very, very disappointed in the battery life when I found out how soon the battery in the main unit wore out. Some of the newer heart monitors - Nikon for one- have user replaceable batteries so you can save a lot of money and time replacing batteries after one or two years.
