I haven't had a NAV card default in a while. Things are performing well. I'm getting used to avoiding (or not getting frustrated by bugs). Most bugs are display issues. The most annoying bug, is the NAV Card Default, which can ruin a drive altogether if I am relying on the NAV. Second is the Voice system often (but not always) forgetting it is already in NAV mode, and requiring me to say "Navigation" before saying "Destination..." or other map voice commands.
Overall, I'm content with the new version for now. If they can stop the Nav system from failing completely from time to time, it would be acceptable. the buttons and display malfunctions should be next, then interface (especially 3D nav) improvement can come later.