Bought a 4BW. Having lived with it now for a week and at only 350 miles it is exactly what I was looking for. Yes, it's a little smaller coming from a CTS V-sport, does not have a V8, etc. For me it just works. It has the personality I wanted. I think the motor and chassis are great, the sound is great, the seats are great, sound system is fine, etc. As expected, it seems the 4 and the 5 have different personalities. Having had M3's, Z06 Vettes, SS Camaros, 944's, various road racing cars I get the unique things of each of those cars. The CT4 fits me now. No regrets and not pining for a CT5. Glad Cadillac is offering us options and two great cars to pick from!