All missions are exciting and I was never bored. Above all, the DLCs are highly recommended. I think the game is not too long or too short and not too hard or too easy. Some old characters also reappear or even back to your team.
The different classes also offer a varied game experience.
Conclusion:
Playing Mass Effect 2, how to watch a good movie, only the action with her for sure! At some points I made the action with the super music paired goosebumps! Play this game! :)