I particularly appreciate the analysis of vulnerabilities, which allows for a complete check up of the computer and Windows setup options: it helps to have a list of software that can introduce security vulnerabilities with a draft resolution (corrective versions when available) and correct some problems setting (active autorun by default ...)
This is particularly effective for managing the security of their computer, whether one is competent or not in the computer field, especially since it often click on a link to the antivirus charge to correct the problem (so no computer knowledge required)
Another interesting point: a very supplied knowledge base is present online, which provides additional information for any vulnerabilities or discovered virus.
If I have a flat in my case (working in IT): Some options are too automated and do not leave enough hand. But convenience for 90% of people (and avoid many silly).
In short, I recommend it!