I was being kind. If it worked the way you describe, it would suck worse than ass. Seriously.

If the app doesn't actually do any navigation then it means it can't reroute if you lose your data connection. It also means it can't reroute quickly when you do have a data connection (at least a non-optimal one). It also means you can't plan a route without a data connection. Which means it's nothing but a toy which means it's no competition for real navigation software. Which means it sucks in my books.

The Google-powered Maps application for iPhone sucks as well. Big time. Completely worthless, I wish I could uninstall it from my iPod since there are other much better apps available. But having the map service as part of the OS is useful and that's the bulk of what that app is exposing anyway.