No, I havn’t seen either one of them. I have read some extensive comments on a cave forum. It sounds like they are worth watching at least once. I’m not much of a movie watcher. I usually see a movie after it’s been out for a few years.
Plot (for both!):
Group goes down in cave and can't get back out.
They get attacked by strange creatures.
Some in the group get eaten by creatures (fun to try and pick who)
Some make it back to surface.
The end............