The site provides valuable information and is a tool well worth having. The program overall is very good at assisting the user in knowing what to expect and to avoid sites which may pose a hazard to their system. That in itself makes it worth having, thus the highest rating as the loss of critical data before backup, can be destructive and though backup is usually done minimally on a daily basis, the loss of data in the short term can cause quite a bit of harm to the machine, the business and the matter at hand.