Casino Royale was a great James Bond movie.
Quantum of Solace is a movie with great action scenes.
Quantum of Solace feels like it's just an extension of the previous movie (plot-wise, it is) and a set up for the next movie. Like too many big action movies, it felt like the character moments were little more than pit stops between action sequences.
Can't say I really liked it. Can't say I really didn't. Fits nice and snugly in between. I don't recommend it, really. Maybe as a rental.