I like that it's nice and small. The sound is good for its price. Ran into a couple of quirks like it didn't want to finish updating its firmware from my phone but at least it instructed me to try it from a PC instead, which I will try. Another quirk is that I set it to treat it as USB DAC as priory over Bluetooth but it still keeps switching over to Bluetooth over USB DAC anyway. I very much like the 2 USB on-the-go cables it comes with. They are nice and flexible, not stiff at all. All in all, it's worth the price.
kaudI had a similar experience. You need to go to 'Input' menu, sub menu 'Bluetooth' and under "BLUETOOTH MODE FOR USB DAC" set it to 'Disconnect A2DP'. This will turn off audio via Bluetooth when using USB but Bluetooth connection will remain on so you can still use the app and it will auto switch back to Bluetooth when you unplug from USB.