I think this game is a gem and i am very excited to see how the story progresses. I am usually no a big fan of time travel stories but, i think that if the narrative doesn't take it self too seriously it can be a very interesting plot device.
I really like the the way the story is going so far. My only 2 complaints about the game so far are:
First, I think the dialogue on the beggining of act one is a little awkward. Everyone kinda sounds like they're robots trying to imitate humans. And second, the game has some perfomance issues. It seems that it doesn't handle 3D graphics very well. Some of the 3D scenes were playing at under 10 fps for me.