What most impressed me about Maurizio Cattelan: All at the Guggenheim was the way it visually held together. It is remarkable how consistent Cattelan was over the years. Where other artists increase their showyness with their fame, Cattelan's work retains a certain scale of production throughout, speaking of a level of discipline that rubs against his reputation as a prankster. It was a forceful and utterly convincing show. And we must wonder whether 'All' is all, or if the title is just another prank. Both make sense - and this, really, is the point.