We use Netwrix Auditor for File Server and Active Directory auditing. It has allowed us to keep an eye on the “who, what, where” of any changes made in our environment and cut down on time spent investigating these changes significantly. It has been saving us about 6 hours per week on the routine work. I like the easy-to-use interface for reporting as well as the automatically generated email updates and alerts. It does the best job keeping our systems secure for the best price.