Well, I didn't like the Blackberry maps either. My complaints then were slow GPS, slow downloading of maps, slow adjustment of my movements. Just slow.
I tried it now and it's fast, much faster then google maps. Plus the internal GPS is much better then the Internet GPS google uses. So I wanted to give it a try again.
And then I found the option to show layers. It's in the menu. You have default layers, like old routes. But I can also choose to add a layer. It then asks for an URL and it says it needs a file type like .kml and .kmz
I'd like to give it a try again. Everyone deserves a second chance right?