I finished that recently. The moment with Claptrap at the end made me laugh so goddamned hard.
Too bad the final boss sucks compared to the first one, even if the battle itself was somewhat better.
Also, I feel both games have the same problem: create a highly interesting world and don't enough in it. The first one was way, way worse though. They barely did SHIT with Pandora. At least the second one has more dynamic feeling quests, for lack of a better term. They tend to be more interesting dialogue wise, and often you just do more interesting shit.
Also, the second game is shorter than the first, which is always a major WTF to me in sequels, especially when the game is dramatically re-invented like BL2 was in terms of feel and the firearm mechanics.