Skyfall is great. I don't know if I like it more than Casino Royale, but it's one of the better Bond movies and a definite step up from the last one. And it looks ridiculously good!
Something odd with it was how it felt like a mix of old Bond, new Bond, and The Dark Knight. Casino Royale and Quantum of Solace both have a similar feel to me. It's not a negative or anything. Sometimes the movie felt like it was pandering to Bond fans (because of the anniversary, I suppose), which is cool as a Bond fan, but occasionally came off as too much.
Um, I think if you're a Bond fan you'll appreciate it more. And the Javier Bardem is awesome in it*
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spoiler (click to show/hide)
I thought his overall story made him a sympathetic villain. This is compared to the villain-ass villains from most Bond movies. All Silva wanted was justice and some Bond dick :'(
I saw it in IMAX. I'd recommend others to see it in IMAX.