Almost great until the end
Then we get the teenage, raunchy sex talk. It really did not fit in with the overall theme and mood of the film,
considering the fade to light screen signified they (definitely the girl) died in that elevator. On top of that no one got the text message they sent, which was obviously sent when they had gone delirious because it only had 5 or 6 letters. This movie was depressing enough and then they attempt to lighten the mood with that 5 minute flashback conversation at the end.
Overall though, this was a well made and well paced film.