For what I can tell the navigation works very fine. I have bought an unlimited license, but now I am denied a navigation portion, since with OS 2008 they converted unlimited to limited licenses. The navigation on N800/N810 is quite reliable, it's certainly not a state of the art user interface, but otherwise it is very stable.

From Wayfinder/Navicore/Vodafone we can't expect any support since they've abandoned the project, however I do have slight hopes, that in this thread a solution will be offered to unlock the navigation.

A couple of days ago I have checked that the following certainly doesn't work: downgrading to OS2007 and installing the original Navicore application. It uses the very same server for activation, which has been shut down by Wayfinder a couple of weeks ago.