Good

For free this works very well, had it for a couple of weeks and the navigation is at least as good as tom-tom etc, re routing is quick if a different street is taken to avoid traffic etc.
The only downfall is finding locations, if you use built in navigate to it usually cant find it BUT if you use the built in google search it works fine.
Overall I now use this instead of my tom-tom so I think its very good, 5 stars if the inbuilt navigate to address worked, but the google function works well.
Update.....this has had problems this last week instructing me to turn into a bus only road and later on saying turn right where there was a No Right Turn sign clearly displayed. Use this with caution.

olimorph about Navmii GPS Australia & NZ