It's alright but I wouldn't rave about it... ...I much prefer his (Neil Marshall) later effort, The Descent. Very entertaining.
You can say similar about all films though... "It's just a bunch of people pretending to be people that they aren't." ...and equally idiotically literal... Music: "It's just a bunch of people making noises simultaneously." Art: "It's just a bunch of people making marks on things." ...and the most ridiculous of all (because people really do say this - what joyous views of the world they must have)... Football: "It's just a bunch of blokes kicking a bag of air about."
RE: You can say similar about all films though... Just watch their snouts wobble, unbeleivable special effects. A can get better masks from co-op on halloween neet.