I have been very pleased with the results of the attack spiders. We have upwards to 50 buildings that are damaged by flickers each year. Many of these buildings are historic.So far the buildings that have the attack spiders on them have not seen further damage. As for mounting the spiders, I use a screw eye and string to raise the spider to the upper eaves. This allows the occupant to change the batteries, or to turn it off if it becomes annoying. So far I have heard only positive feed back. So you can rest assured that I am pleased with the results so far. Thanks