Pretentious is the first word that comes to mind. I tried to watch it all the way through but could not last past the first half hour or so. An extra half star just for the benefit of the doubt. I didn't enjoy his last film either.
Almost experimental. Great soundtrack. Moody as hell. Tracking shots like those of Birth. Reminds me of Roeg's "The Man Who Fell to Earth" in that the film is experienced through the eyes of the alien. Not much is explained. I like the mystery.