I like! Going to Buick's Web site, it seems like the interior is at least as slick as the sheetmetal.
I'm guessing this is based on the ATS/CTS/Camaro Alpha platform, so it could potentially be produced. I'm seeing shades of ATS-V coupe in the proportions of the front and rear overhangs. Seeing how Buick's playing up its handling chops and the Alpha platform being lauded for handling with the ATS and Camaro that leads me to believe that this is sharing that platform. Makes sense that GM would want to give its near-luxury brand a sporty coupe as a way to further differentiate themselves from Chevrolet.