Funny that you mention the i3, because my husband and I both drove the ID.4 during the local Roadshow stop, and we both commented that the ID.4 felt like a bigger version of our i3. That's a good thing. The stereo certainly didn't blow me away, but we thought it was acceptable. I don't think the Beats stereo in our Jetta sounds any better (though it has a ton of bass if you want it), to be honest. The h/k in our MINI definitely sounds better, and the base "hi-fi" stereo in our BMW (not the i3) is probably on par or just a bit better. I won't lie, I'm bummed about the lack of a premium stereo option, particularly on the rather expensive Pro S trim (especially with the AWD, as we've ordered). But from what I heard during the Roadshow it's not a dealbreaker for us.