I liked it quite a bit. Not entirely sure how it fits into my "Best of 2006" list because I'm still processing it. Very philosophical. The love story was warm, but it could have been even warmer. If the chemistry and love had been as epic as Eternal Sunshine or Constant Gardener, this movie would have been even better. Definitely worth seeing, but it is very slow and contemplative and might turn off people who want action. Certainly his slowest film, and I suspect many people won't be able to take it. Definitely an avant garde film.
I can all but guarantee you there will be dozens if not hundreds of posts misinterpreting the movie to be about time travel. Which would not be surprising since they were almost promoting it thusly.
The visuals were off the charts. Better than any I can remember in recent years. The sound track was good too, great in some places.