I notice the knobs and buttons on the GNS 480 look different than your other GPS and VHF navigation units. Will I have to learn a new user interface?

The GNS 480 improves the intuitive user interface. Those with experience using Garmin AT avionics will feel right at home with the GNS 480. The buttons and knobs on the GNS 480 have increased in size, have improved tactile feedback, and are backlit for easy night viewing. The GNS 480 comes with an interactive computer-based training CD-ROM to help with learning.

More information about the GNS 480 can be found here.