Quick update on the Zumo XT. I've been using it almost daily for a few weeks now. I find the audio control usable if a bit clunky. The screen is amazing. It's easily readable, even in direct sunlight. I have uploaded a couple of test routes to the unit from Basecamp and I haven't noticed any of the routing issues others have complained about. It has worked perfectly each time. I like the custom map layer capability, though there is an ongoing learning curve getting them right. I have had problems making and answering phone calls. There seems to be a priority conflict between my Cardo G9X headset and the Zumo. It could just be outdated firmware/software on the headset, though there hasn't been an update in years. Or, perhaps it's my Iphone 6, because I had similar problems with the Zumo 665. Both the headset and phone are due for updates. We'll see if either one or both solve the conflicts.