Should anypony be interested, Cyonix from My Little Reviews & Feedback has done a rather in-depth review of Double Trouble: The Flaws Within1. You can read it it here:
Been saving up, and just bought a fitbit versa 2. Mostly--very mostly--for the heart and sleep monitoring functions...cuz when you have five sleep disorders, cardiac arrhythmia and AFib, well...
You come first.
You come first.
Not the writing, nor the reading, nor the anything. Take care of you first, and the rest will follow.