This was a wonderful movie. The chemistry between the actors was great, and the storyline was amazing. It was suspenseful, especially when they suspected Ethan Hawke's character of a murder (or something bad, its been awhile since I've seen it). It was so well done in general. The ending is so tragic and sad though, but it made sense.
I really love all the sci-fi futuristic things they thought of, they were quite unique and fascinating, especially the thing with conceiving children. It was sad how the natural way of having children caused him to have so many problems :[