The ease in setting up a project plan and managing available resources.
When work items have to be rescheduled in a project plan that includes lead and lag time. The trickle down affect can be confusing for the novice when you have relationships between work items.
PlanView is a very customizable software tool with a wide range of options.
Implementation time and administration staffing needs will depend on how much customizing you do.
As a training instructor and administrator of the software, I found PlanView easy to use and train.
PlanView provides great online training resources and material.
Allows for better visual of resource planning. Able to see resource availability more easily when planning for current or future projects.