Finished the main game and I'll say the beginning through probably 2/3 the way through, game was great. The last 1/3 didn't seem to have the same amount of charm as the characterization of the new characters were a bit inconsistent. Also, at that point in the game, if you did heavy investment into property, there was really no reason to do any of the extra side missions because you'd be flush with cash.
There is a split choice in the ending. I'll be honest though, if you compare the book ends, first and last missions. The first was MUCH better.
That being said, i got a lot of entrainment out of the game and do co op with a friend who's playing it much slower since he's also playing Skyrim.