Never liked the 2000-2005 style. The 2006 is a much more upscale looking car. I love the Art & Science styling cues, they're bold and expressive (as a Cadillac should be!). The company seemed to lose it's way for a while there, but the new designs are bringing it back.
no oil leaks
no overheating problem
no starter under intake manifold
no window problems
no vent problems under dash
Great car. I have an elderly friend with one that has about 30 k miles on it. but the dang guy has been sick for years. The local joke around town is that I am waiting to buy that car from the family, but the owner simply refuses to die on us.