Central admins, site collection admins, and full control owners cannot easily see and understand where users and groups have permissions within their scope of authority across the farm. However, it is oftentimes important for administrators to be able to see this.  You can't manage what you can't see.  Manually navigating through securable objects is arduous if not outright impractical. DeliverPoint performs this function in one easy action.

• Quickly see where an account is uniquely permissioned across the farm in one single screen. 
• Non-It Administrators can now easily see & understand where users and groups have permissions in their site collections, workspaces, lists and libraries.
• View permissions for an account across any scope: from the farm level to the individual website level.
• Security trimmed so each user sees only the account permissions they are authorized to see in SharePoint