The only place where the interface falls short is in the menu system, and there it's teeth-gnashingly frustrating to use. For one, the scroll area is on the inside edge, so your hand blocks the display while you're scrolling. Second, the multitouch-like scroll operations make it impossible to accurately move a single entry at a time, so I always scroll past the entry I want and repeatedly select the wrong entries along the way. At best, it will take some getting used to; at worst, it will make you nuts.
(Peaking and Zebra are turned on, hence the odd red pixels and crosshatching on the background image.)