one of the main reasons i watched this movie is because it was indeed very overhyped, it has a 90+% ratings in rottentomatoes and is always considered top rated by other movie websites, ..yes it was good but it does not share the same rank as alien, evil dead, the thing and other movies considered best in horror genre. is it worth buying in blueray/dvd?- yes, its entertaining and the concept is somehow very unique. its a B+ horror movie
Although I did very much enjoy the movie and would recommend it to people it suffered from some problems.