A USB flash drive I have not had it. I hear music via Bluetooth from your phone. Here I must first manually switch on the Bluetooth source. The music will be played automatically. I turn off the radio, the player (Google Play Music) is automatically set to pause. Unfortunately, you can read more about Bluetooth No cover or music tracks in the display, but that is probably due to the Google Play Music app. The sound is impeccable, thanks to the built-in equalizer.
The Internet functionality I have never been tested. Not only because of the lack of apps I do not need that.
If you switch the unit on, it takes about 30 seconds until it is ready for use and your smartphone connects to it. For some a long time, but acceptable for me.
The navigation menu is a bit strange, with a little practice you will find, however, cope and everything works quite well.
I can issue a strong buy recommendation with a clear conscience!