I didn't think the plot was twisty enough. Considering it was supposed to be a sci-fi whodunnit thriller with a dark "ironic" edge to it, it all seemed a bit basic (and more than a little predictable). Not something I'd go out of my way to see again although it wasn't bad. It just didn't leave any questions nagging in my head that would have me watching it again, the way a good thriller like that normally does.
I think Spielberg should stick to the popcorn stuff rather than this kind of thing. Funny, I like AI