When my Charge 4 broke from its straps after only a year, I was given the option of another 4 for free or a Charge 5 at half price. Figuring the weak connection design on the 4 would fail again, I chose the upgrade. Big regrets. It's so inaccurate! Says I slept well when I slept 3 hours, congratulated me on 10k steps when I literally sat in a chair all day because I was sick, runs out of battery WAY more frequently than the Charge 4, says my heartbeat is too low to detect afib, when it is clearly counting my normal heart rate at a detectable level. GPS almost never connects, and when it does, it kills the full battery mid-bike ride. I trust nothing it tells me. Anybody else disappointed in this "upgrade"? I really wish I had just gotten another Charge 4!
