I loved Dog Soldiers too, not least cause of a massive crush on Sean Pertwee, who is effing brilliant in it (he's the one that lives through that partial evisceration early on). So yeah, I was pumped about The Descent.
If you enjoy horror movies with stupid, stupid characters that completely deserve to die anyway (a legitimate genre of course), The Descent is for you. Ju-heezeyus Christ. If there had been no monsters, you'd have ended up with the same body count, I swear.
[hide]Sci-fi-geek-wise, my only nitpicks are the goofery of the monsters' selective hearing (they hear what the plot needs them to) and holy geeze there must be a shitload of prey animals in the area. It's like finding a cave full of 85 cougars. If, of course, the whole thing wasn't a dream.[/hide]
But yeah, you'll be able to stop caring and just enjoy the carnage after these girls enter a completely unmarked cave and crawl down a tiny hole to fuck knows where, for shits and giggles.
ETA: Ta (presumably to Walter) for the spoiler protection, I was being my usual inconsiderate jerk movie ruining self. Vader is Luke's father, and the chick from the Crying Game is a dude. Oh, and Bruce Willis was dead the whole time.