I have only had mine a few days and am at 220 miles. I do not experience most of the issues I read about by others - my blinkers synchronize to the sound, the upgraded seats are really nice for me (5'7", 140, I think it helpful to know as we all fit in things differently), plenty of pedal space for my size 9s. Rear camera resolution is awesome on mine. Massagers are awesome, some reviews said they do nothing but they sure do on mine. Audio system is also better than expected based upon comments I have read.
Nitpicks - the cupholders could use a bit more diameter and I prefer some rubber trim on the inside. My Yeti tumbler does fit but barely, and I am careful setting it in there to not scratch the top metal trim rings. Seatbelt reminder is obnoxious, hoping a local dealer can turn it off or perhaps it is a setting somewhere. The lack of a full surround camera system is disappointing. I am quite accustomed to it from my 2015 Sierra 2500, and my 2020 Sierra 1500. How does any Cadillac not include that? I would like to have it to get as close to curbs as possible without hitting wheels, but it is a small car and easy enough to park.
The center stack is not exciting, we all know this before buying the car. The shiny black plastic between the screen and buttons below is very out of place. Still, this car starts below 60k, and I find the interior very high quality relative to the pricepoint. The 5 starting in the mid 80s- that is a larger gripe for me. It needs to be much better there. It could use some more open storage areas, but it looks very clean as is.
So very minimal complaints for me. And 0 concerns regarding the driving of the car. Absolutely stellar experience, and I can't wait to elevate the RPMs after break in. 6MT is amazing. It is easy to argue the 4 is the better Blackwing package given its price tag, but of course the 5 gives you that glorious LT4, and it alone is worth the extra cost. I do still have a 5 on order, but I can see not wanting to trade the 4 in as it so fun and "usable" as a daily driver.