The revelation that Willis is a ghost,is frankly all the film has going for it.

I have to disagree with that. If you watch the film a second time, the knowledge that he's a ghost gives the whole thing another dimension. It makes his situation more poignant when you know he's a ghost and he doesn't. The twist is certainly a key moment, but the film doesn't unravel as an experience once you know it.

I'd agree on Shyamalan's other films though. He quickly got caught up in the twist gimmick and his films become weighed down by a stifling self-importance. And now his films are more exercises in "guess the twist" than entertainment in their own right.

But I think The Sixth Sense is a very intelligent and skillful bit of film-making.