ME3 does not disappoint, and provides a worthy end to the trilogy.
1) Awesome environment design.
2) Dynamic, exciting combat.
3) Great story, cinematics, and choice / consequence events.
To these was added a lot of minor improvement like more weapon choices and mods, removal of planetary mining and addition of a slightly more interesting exploration mechanic, and so on.
The only problem I can report about this game is the first DLC that holds a prothean teammate and which feels like it should have been part of the core game since it gives quite a few insights. However since the game's content is plentiful in quality and quantity, this is not a huge issue.
Highly recommended.