From what Ive see of it, it would still be worth playing even knowing its ending may not be so good.
I think it is more a case of people not liking the ending than the ending not being good (of course some people may mot like it and think it is not good). I know enough of the ending (because a few people don't know or care enough to use spoiler tags) to know why many people don't like it, but I'll have to finish the game to decide if it is a good ending, or not.
