Heh, I was hoping no-one would ask me about the rating
It's a game I would struggle to put a number on. The board game is unquestionably a 5 out of 5. But there are enough niggles in this digital version to make me feel it's not worth full marks. A smattering of minor bugs and usability issues, plus the sense that while the AI is better than I was expecting, it could be better still.
So I guess it depends. If you're new to the game, it's a five-star game you should go buy now. If you're already familiar with it, and especially if you're comfortable playing online with with one of the rough and ready amateur versions, it's a four.