I own it watched and I'd I cant say they added to much to the movie, some cheap CGI blood here and there, all the deleted scenes intergreated into the movie few extented scenes....BUT not that much else to the movie, the special features though were a big improvment show much more about the movie and creature designs, all I can say is DAMN YOU ANDERSON MAKE A GOOD MOVIE TO BEGAIN WITH!, Anyways, I would pay the $12.59 to buy it like me unless you really much see what little was added to the movie, although the extra features on the second disc were a big improvment, still it is what it is.