Sanctum kind of hovers around the middle. I saw in on dvd and really regret not seeing it at the cinema in 3D. I think that would have been a deciding factor... but in regular 2D its nothing new. We're seen it all before, in fact so many times that it's almost a genre unto itself. The script it derivative and hokey and Richard Roxburgh delivers one of the kitchiest roles of his career... but at the end of the day its a no-brainer popcorn flick. It looks good and it's exciting.... the pace is tight and ultimately is entertaining enough to recommend. Wish I'd seen it in 3D though.