I recently tried to post a comment about the filters I purchased for my Red Devil Scorpion Hand Vac and because it was a negative comment they said it was against their rules now to post any biased comments. How is one to let people know of an inferior product if they can no longer post anything but positive comments on their site? I've been buying from Amazon on a regular basis since it's inception and this is a first. I want other people to know this too since now you cannot tell if a product is good or bad!