I love my 8 speed. I never hate it, but sometimes it does small annoying things, but I expected an 8 speed to be a little finicky sometimes since I also have an 8 speed in my Audi A7. Once you learn when to step on it and not to, it rarely does anything weird.
It's awesome to heavily step on the throttle without actually hammering it, and let the the 6.2 run through all of the gears to about 80mph. Feels like I'm driving a "muscle truck" with a buttery smooth transmission.