I've only had my Edge since the spring so I cant speak for any winter driving yet, The navigation gets me to where I have to go I just need to give myself a few extra minutes putting in my destination. Not really any worse than my old Garmin. No complaints about the stereo or bluetooth. Climate controls I'm also better off setting up before hand since the steering wheel controls are lacking there.
Main gripe if you can call it that is the colors on the right hand display screen, If I choose the sound system it's distracting to see the color red coming from the dashboard when I'm eyeballing the road.