For me it's only a week old, so I'm still having fun exploring and seeing what this device can and cannot do...
Coming from a V40 and V20 before that, I'm happy to see the DAC is better than ever. I use Bluetooth headphones from time to time but I prefer and I'm spoiled by the headphone jack. A must have in my book. The battery life is outstanding, even with the dual screen (which I've used off and on) is very good.
So far I haven't had any complaints (like I've said, I've only had it a week) so I'm sure there will be things that will pop up as I explore...
One thing I've noticed is when you "clear all" there's a set of apps that pop up and sit at the bottom of the screen (they change based on app usage) I'm trying to figure out how to either customize the apps you want or dismiss them altogether. Other than that, I'm really liking this device and I'm glad I've decided to upgrade from the V40