The N900 does have usable maps, you're just comparing it to amazing map applications.

Also words like great, amazing, and usable aren't explicitly defined in this context, so they can be used ALMOST regardless of the application. I say almost because if it literally was unusable -- i.e. crashed every two minutes, or there weren't any maps available -- then it would matter, and then it would warrant a forum post like this.

This is just another case of a user thinking he or she is entitled to more than they really are. I'm sorry certain features weren't up to your expectations.