There maybe times when the software updates are not quite correct, but the accuracy of the sleep times and the walking distances, far exceeds products from Withings and MS Band 2. I have tried all three for several months. The Jawbone 3 on one wrist and either the Band 2 or the Withings on the other wrist.
The Band 2 consistently says I woke up 8 or 9 times during the night, when in reality I woke up 1 time. It does not record sleep patterns correctly either. As for the Withings watch, says I when to sleep at 2 am when the actual time was 10:30 pm. All three record distance fine, but for sleep patterns and accuracy, nothing surpasses the Jawbone 3!!!!!!!
Bob5061 about UP® – Smart Coach for Health