After Vesper's death, Bond gets really pissed off and goes to do bad things to people who were...somehow related by being not at all related?
There are no gadgets in this movie, which is a carnal sin for Bond films. There's barely even an Aston Martin or a watch flash, he doesn't use a PPK, the whole film feels like a Bourne movie reskinned to LOOK like a Bond film. That being said, the action scenes are very good, and Bond shows a very dark element in the end when Greene dies.
All in all, great movie, terrible Bond film. Not that Casino was particularly great.