I'm ignoring that this is a Bioshock game despite the fact that it's the title. If I kept that in mind while playing it'd get even more frustrating, because this would be better as a standalone game without latching itself to Bioshock. Easy enough, really.
Even ignoring the title, this is a great game ruined by a convoluted story. The ending had me screaming at my tv in rage at just how dumb it was. The general idea (the spoilery stuff) was cool in concept, but the execution just ruined the entire experience to the point I can't believe I wasted so much time with this game.
Honestly, if you don't care about plot stuff, go for it! But since I pretty much only ever play video games for the story-telling, I can't say it's for me. The "Thank You"s at the end were fun, though. I think I'm going to take up knitting now.