"Lucy". Saw it last night and quite enjoyed it. It's a bit Sci-Fi-ish and has great special effects, but most of all I enjoyed Scarlett Johanssen's performance as Lucy... she was convincing and believable throughout.
I won't spoil it for those who haven't seen it, and I recommend you do, but I would have had it end a little differently had it been up to me. Having said that, though, it wasn't like alot of movies that end without a proper/decent conclusion. Lucy's ending offers a believable and proper conclusion that doesn't leave you thinking: "WTF?".