Just watched the blu-ray version. Too bad it wasn't available on HD-DVD. It played smoothly on my Panasonic blu-ray player, but the regular DVD looked almost as good on my Toshiba HD-DVD player. It is a shame that inferior technology, bought by Sony buying out the studios, is what we are stuck with. Visually the movie is very nice as the CGI was well done. The plot and the alien evolutionary assumptions were very weak. Five fingers and finger nails, give me a break!!! Don't think too much while you are watching this movie and you may enjoy it. The plot line follows the Gaia ideology mixed in with Dances with Wolves. It is a watch it once movie and forget it.