Fully functional project management software that can be integrated with MS Project & Excel if needed.
I love that there are customizable, role specific dashboards. It means that everyone see exactly what they need to in order to get their job done.
The huge variety of report types to choose from, their interactiveness and the ease of automatically emailing them to team members is a huge time saver.
Overall, projects can be easily set up but as the project grows you will be able to take advantage of all the higher level features you expect in PM software.
For anyone who is not familiar with this type of program, there will be a slight learning curve but that is to be expected with any new software.