I heard Peter De Lorenzo talk about the pricing of this thing - pretty much everyone agrees it's pretty high given the history of the brand.
His view, and he was in auto marketing for a long time, was that you decide where you want to play, and price it there...the market will decide whether it's worth it or not. Buick may also be setting the bar for the future as well.
Recall that poster in that abandoned BMW dealership on "Is a BMW worth the money?" You will likely not see one of those at modern BMWs now!