Just checked out the show today which was nice as I hadn't been for 5 years!
I agree Edcar - the SLS AMG was fantastic! I liked that I was able to check out all the vehicles and sit inside them and see how they performed on style, comfort and quality alone.
One car that impressed me was the Chevrolet Cruze. I'll admit I didn't have high expectations for it given how awful the Cobalt is, however I think it's fair to say that Chevy finally has a decent compact to go up against the competition. The Ford Fiesta is definitely one of the best subcompacts out there, however I think I was expecting a bit more in the sense that in pictures it came off as being more premium and richer looking than in person, however for the price and the class that it is in, it's definitely a winner. Another car that impressed me is the new Sonata which, while not 100% perfect, is very attractive and comfortable.
Cars that disappointed me included the Acura lineup, the Lexus LS, Chevrolet Camaro and Cadillac CTS. Acura's have become rather unattractive with their nasty front grilles, their interiors are no better than their Honda counterparts and they have a rather toxic new car smell. My cousin's 04 TSX suffered from that as well. The Lexus LS I was disappointed with given the price they charge and how it can supposedly compete with the Germans, however the interior uses lower grade plastics than the competition and the wood trim looks incredibly fake. The Chevrolet Camaro is very cartoon-like on the outside and the interior is by far THE worst car interior on a car over $20,000 that I've seen in a while. Even the Dodge Challenger has a nicer interior. The Cadillac CTS disappointed me in terms of quality as well. The interior seems nice in pictures, however in person it ends up being very chintzy.