The 3D is very good. Far from the days of blue and red glasses.
Storyline: Expect a typical brainless slasher film where you are screaming at the screen "Why are you doing that?" and you are cheering for the killer to get the victims because they are so stupid. There are many unintentionally funny moments where our audience burst out laughing.
Stupid storyline, lots of "mining pick in the eye/head/chest/face" moments, lots of characters doing stupid stuff, bad lines. The only reason I'm not giving it a 1 is because this IS a slasher film and you dont go to a slasher film expecting quality story.