I purchased a safety sign from this category, hoping to warn potential trespassers but it was a waste of money. According to my experience, the sign had no effect, and the trespassing continued as usual... The only pro is that it is made from durable material, but that doesn't mean it serves its purpose. The con is that i wasted my money on a product that did not live up to its marketing claims. I would not recommend this product to anyone looking for a reliable trespassing warning sign..See full review