Opening a door with a tissue or paper towel would work just as well and not cost $12.95! What would you do after the Germbrella is covered with germs? It has also been suggested that some exposure to germs strengthens the immune system and a "germophobe" approach may actually keep your immune system from working as well.
I agree with Mikesmom. Do you realize that we're increasing the rates of asthma and allergies (among other problems) because of our overuse of antimicrobials and our attempts to sterilize our homes? These products are aimed at our fears, becausethey are what drive us to act, and it's all just a marketing gimmick to make money. Don't buy into it.