It seems that people either love or hate this movie. Personally i thought it was really exceptional for a TV horror movie. The people who dislike this movie are probably the people who thought The Blair Witch Project was scary.
Disappearance truly creeped me out, which is very difficult for a film to do. I watch just about every horror film out there and very few really "scare" me, but Disappearance comes very close to doing the deed.
You never see what is really the evil force throughout the movie, and i liked that a lot. Many horror films show the "monster" or "evil" or whatever you wish to call it later near the end to the film, or sometimes earlier. This strayed away from that and it leaves you wondering about what it really was. Plus, a family trapped in a ghost town in the middle of the desert makes an exceptional horror tale.
I thought the script, acting, and direction were all very well done. I also liked the music score a lot. There weren't any lame "happy pop" songs which seem to proliferate today's horror movies, and consequently make them all fail due to that fact. Disappearance went back to a direction of the old-school style creating a truly malevolent score for the movie.
I am very glad i rented this little gem, and will surely be adding this to my personal DVD collection.