BMI has been enjoying our recent implementations of Dynamics NAV 2013. The Role Tailored Client (RTC) makes it easy for people to work with the functionality they need to perform their jobs. There are out-of-the-box roles available which can be customized and new roles can be created. The RTC features the "ribbon" which users of Office will be familiar with. The ribbon can also be customized.
Reporting has been an especially interesting aspect of NAV 2013 as the old report writer has gone away and Microsoft Visual Studio has taken its place. You can also use SQL Reporting Services and other third party reporting tools.
The RTC has a more visual feel than the "Classic Client" and various "parts" can be inserted on the user's home screen. Parts can be customer lists, vendor lists, Outlook email, sales graphs, etc. Each user can customize their own parts.