Mine only has intakes so is only barely better than stock. I installed the intakes a week or so into ownership (I wanted to hear the turbines spool up). I tried engaging launch mode the first drive but did not actually launch it.
I did a lot of spirited driving in the first 300 miles; not much full throttle, not visiting the rev limiter (I probably kept it below 5000 in general) but just a lot of varying of rpm and speed with a few brief full throttle bursts. From 300 miles to about 600, I pushed it to about 75% of potential. After not having driven my Corvettes on years (tl;dr: parked them when building a business a hurricane decided to push a tree over on to the ZR1) the Stinger felt fast. Like, really fast, because out of the box it performs nearly as well as the ZR1 did when it was stock.
600 miles: full send up to 75mph or so. Maine doesn't have any faster roads. :-(
600 miles to 2000 miles: a LOT of full throttle pulls from the digs up to the limit, learning timing lifting of the throttle to stop accelerating at exactly the limit. I launch out of my driveway up to 25mph (my neighbor's kids love that, especially the teenager)
2000 - 3800 miles: some spirited driving, occasional full throttle runs, but avoiding launching when someone wants to race (I take off slowly when street racers try to bait me), but I am mostly exploring comfort mode, have added a Mando ECS10 and keep the suspension on Mando's sport mode even in the car's comfort mode, and just enjoying the luxury ride taking off only moderately quickly.
I haven't changed the oil yet; I want the dealer to do it (to maintain an ongoing and favorable relationship with them should I hit warranty issues).