It's an alright game. The characters and are solid , and the events of the game can be felt in the sequel. If you enjoy political intrigue, you're in for a real treat. That combat though, good lord it's awful. I wouldn't blame you if you just lowered the difficulty to easy just to get through it faster. Also, the game was designed for 7th gen consoles in mind, and it shows. The areas all feel so tiny and constrained, resulting in a much more linear experience than 1 or 3. It's my least favorite in the trilogy by far, but despite everything, I do think it's worth playing.
Edit: I forgot to mention, the game has two branching paths that radically change the second act. That's cool and ambitious, but I honestly didn't enjoy it enough to go back and experience the second path.