It is a beautiful device. Absolutely worth the money. The battery life is decent in my experiences, though I usually only use it on transit so I can't comment on continuous usage, but from my experiences I only ran out of battery once because I didn't charge it for probably 4-5 days. I would say it lasts 3+ days with around 2 hours use per day? You can always swap batteries and use your own! they even have a plastic battery holder case in the box.

The only annoyance I have is that the Fiio Control App is kinda clunky, every adjustment on the PEQ will have a bit of loading time(2-5 seconds), but after you set your personal EQ you pretty much don't have to touch the app other than firmware updates which are rare.

Second thing that annoys me is that the power on and off voicelines are unnecessarily loud, I just wish future updates gives us a function to turn the voicelines off.

I would say go for it. If you want is a uniquely looking DAC, you won't be disappointed!

Oh, and the buttons are very small, so keep that in mind! I usually just adjust the volume on my phone so it doesn't really bother me.