One side is the movie. At that point, I was really hooked into the story, which was further enhanced by my curiosity about some flash-forwards to the tour guide being interrogated about the death of some tourists, and flashbacks to some bizarre rites. In addition, strange things were happening to the tourists - skin rashes in an ancient alphabet, visions, and the like, and all this was fairly spooky and the dark humor was fairly funny. The last forty minutes aren't as good, but I still liked the way they resolved it, handling it more as a creepy mystery movie with a supernatural overlay, rather than as a horror film, and gradually unraveling the characters' own sense of confusion about what happened. The film didn't really supply any closure or any explanation, although it did finally show all the missing parts of the tapes.
All simple memories are, by definition, less real than what's on the tapes.
I thought the ending was creepy, spooky, and surprising. These scores are consistent with the critical consensus. 7.5 usually indicates a level of excellence, about like three and a half stars from the critics. 6.0 usually indicates lukewarm watchability, about like two and a half stars from the critics. The fives are generally not worthwhile unless they are really your kind of material, about like two stars from the critics.