I read on a Buick board mixed reviews as well. Basically, looks plain, but it's fast. Sorta like the original GTO, except now it has a premium price tag, and a history that demands it back up the GTO name. Basically, it doesn't.
Of course there was one guy that had bought one, and praised its every virtue. But I have a feeling the "ooh ahh" appeal will wear off, people won't crowd around his car anymore, and he'll wonder why he spent so much on so little.
I hear sales are far below projections, so if you're wanting one, wait until they're bringing in the new year models and get it cheaper.