Nice! I had a 2014 Regal GS and it was a wonderful car except for the 2.0 turbo engine. The new GS with the 3.6 should give plenty of trouble free miles, sound pretty good and be enjoyable to wind out on back roads. Post a review here after you finish breaking it in, I am not in the market for one anymore but I still really like that car.
The girlfriend is a big fan of Buick and has an older LeSabre. She's in the market to replace it and we saw these on the lot. A little rich for her blood (probably more in the market for a LaCrosse) but I must say, theyre very sharp. Congrats on the new car!