Sounds like the chassis and powertrain are winners. Caddy is still cutting corners on the interior and the art & science design is starting to look really date. At the same cost of an M3, it's going to be a hard sell.
Try as I might, I just can't fathom who would buy this over the M3/ M4. You're talking a difference of $2000, the BMW is a BMW, has a DCT transmission, a BMW interior, looks better, and did I mention it's a BMW? Oh yeah, and it's a BMW.