Just got my new CTS-V! Wow, is this thing fun to drive! Before making this purchase, I test drove a few speedy sedans and coupes cars (GTO, Mustang, G35, and BMW 330i) and I fell in love with the Caddy.
Excellent stereo, easy to use navigation and comfortable seats. For this type of car, back seat appears to be comfortable (I haven't sat in the too often).
Upgrade the interior materials so it doesn't look so plasticky.