"a voice says things like, "This is ten! Ten! We have killed your friends." Creepy, but it doesn't make any sense. "

That's the only part I have a disagreement with the reviewer about. To my mind, a strange voice screaming something killing my friends is definitely more scary than the Hotel California-esque 'express check out' comment. The former is more surreal, Orwelian in a way, and is far more real a threat.