I played with it last night on a 20 mile trip. Overall I really liked it. I think for my taste I need to change the zoom tilt level a bit.
I did get a reboot once. I was switching screens, I went to hit the menu button, but hit map by mistake, I then hit menu, maybe a second later and it rebooted. When it came up, it still had my route active, and all was well.
Also the trip computer only showed zeros the whole time, but I have been reading all the posts about that issue.
FWIW, I DO have the VSS wire hooked up, and I know it works because I live in Pittsburgh (THANK GOD the G20 is over...) and we have plenty of tunnels. Without VSS, when entering a tunnel in rush hour, the AVIC would assume I am going highway speeds, and it would show me a good ½ mile ahead by the time I exit the tunnel. With the VSS hooked up, it was very close, and if traffic stopped, the AVIC would show me stopped. I wish it used VSS better, but it seems to only use it when there is no GPS signal, it will not override it when you are stopped, it will still show .03MPH...