As a current owner (2023 GT w/performance pack)...The ride quality is fantastic(!), the air suspension is very composed, and handles sporty driving as well. Cabin noise is low, long drives are very relaxing, even if you're not using the massage seats.
The power delivery is very very smooth, it feels like a big engine, but without the vibration or waiting for power. Power delivery really is quite impressive, it can even make it feel slower than it is, because it masks it so well, until you notice the numbers you're doing, and that it's still pulling at high speed. Speaking of high speed, that 2 speed gearbox is fantastic. I wish more EV's had that (at least the performance ones). The power available at higher speeds is very impressive.
The seats are easy to get comfortable in, get very low (thanks Porsche), and are very adjustable to being able to hold you in place during high-G loads. Heating, cooling, and massage in the leather seats too. I love these seats.
Infotainment works well, Android Auto and Carplay are both there, and wireless in my 2023.
Trunk space both front and rear, are good sizes. Unfortunately not a hatch, but still good amounts of space.
Rear seats seem comfortable from sitting in them once to try, but I almost very literally never use rear seats in any of my cars, so I have nothing else to say about them.
Charging speed is incredible(!!), I went from 10-80% in 19 minutes and 1 second, earlier today, and it was only 45 degrees outside. I couldn't believe how well it did, and I definitely didn't expect that today haha. I typically charge at home, but I stop at Electrify America chargers sometimes, to get a top off, or to stop and eat something/go to the bathroom. With any of the Tesla or Polestar cars I've owned or driven, they drop the charge level pretty rapidly once you're past that initial huge surge. The GT on the other hand, can still charge at 100kW at 80%! Our Tesla cars are already dropping 100kW at 50%, and keep getting slower from there.
Sound system is good, not perfect, but definitely good. I wish it had a proper EQ, but we can't win 'em all haha.
About the only real gripe that I can think of right now, is that Android Auto navigation doesn't talk to the gauge cluster, so if you want to have nav in the cluster, you have to use the built-in Audi nav. That nav is good, but not as good, and doesn't have all of the chargers showing up, so you can't always precondition the battery by navigating to the charger, but it still charges fast anyway.