Battery only lasts for 4 hours, found my pulse right away, but hasn’t found it since.
Waiting for woot to get back about a refund (hopefully) or a replacement.
The ‘warranty’ service told me that they won’t honor the T&C at the bottom of the page, which says they’ll send a replacement and a return shipping label… you have to ship it back to them and there is an unknown turnaround time, and likely slow shipping back.