Well I have had my Polar F6 for about 6 years now. I thought at one point I would upgrade to a cheaper Garmin model that had a footpod and now it doesn't work and I have gone back to my Polar. I changed the battery in my Polar and it is as good as new again. If you are really looking for a true HR monitor and not the GPS technology so much I would highly recommend a Polar F6. This has the encoded transmitter so you won't get interference at the gym from other wearers and it won't break the bank. Another cool thing is a lot of the gyms have treadmills that will automatically pick up your heart rate if its a Polar, same for the spin bikes at my gym too. All I know is I kept trying to upgrade to something cooler and more techno but I kept falling back on my Polar when something broke or just didn't do what I wanted. They make a very durable product.