And its specifications do not claim to protect from any typically destructive surge.
The effective protector has a wire that connects the surge to earth. Either that surge is earthed long before it gets near to a computer. Or that protector simply protects from transients that typically do no damage.
Monster has a long history of identifying scams. Then selling an equivalent product for even higher prices and profits. What contains a circuit similar to what is found in a Monster? That Belkin protector.
Protection is better found in products from more responsible companies including ABB, Siemens, and Keison. An example when protection from destructive transients is desired: http://www.aelgroup.co.uk/htm/tdc.htm