I don't get to drive the wife's Jetta much these days, but there are "quirks". Most of them in the dashboard & related "logic". And many wouldn't be obvious unless you had multiple drivers.
The various menus in the entertainment center aren't all logically laid out, and I'm constantly pushing way more buttons than I should to get at info. You can customize the center display somewhat, but not as much as I'd like. And documentation on the various settings is pretty much non-existent.
But once you get past that and settle in on the UI you prefer (most of which is remembered with your profile), it rides & drives nice, is very comfortable, and has extremely good gas mileage.
The Beats audio system is good, but not great. But that would depend on what you're comparing to (in my case, my Jeep Grand Cherokee blows it away).
Love the LED headlights. Unlike our old Mazda3 with HID, these are extremely well-designed. At low beam they get really good front & side coverage, with minimal flashing from other drivers (you'll always get the occasional old fogey flash you just because). With the high beams, you can land aircraft! And once you get used to the quirky user interface for the high beam control, the automatic high beams work really well.
I'm the kind of person who, no matter what it is I buy, there's "something" about it I'd have designed differently. So too with the Jetta. :-)
Definitely drive a Jetta, and a Civic, and a couple of other models in your price range. When we were shopping I'd spent many hours coming up with the feature list of "must have", "nice to have", "can't have" and "wouldn't pay extra for". The Jetta ticked the most boxes for our desires, but your own boxes might differ.