I wish another variant could be produced that has a longer battery life. I run ultramarathons and have 3 of these that I stage in my drop bags; none of them last longer than 6 hours (even the brand new Mighty 3)
Doubling the battery life would be a godsend for those who do more than an average workout.
This is the absolute best. Since I discovered Mighty I never leave on a run without it. I'm on my third device (the first one got crushed by a car after I dropped it and the second one got drowned on my washing machine after I forgot to take it out of my clothes), and I would definitely it again if anything happened to the one I'm currently using. (And they don't sell it in my country so that's saying something). An absolute genius little little thing!
Had mine for a couple of years now, it is perfect for running with, lightweight, easy to use and set up. You can upload your playlists or alums from Amazon Music (free if you pay for Prime) and away you go.
The only criticism I have is the battery.