I liked the idea of the app, but found it hard to use. On a 8310:
+ the options had to be explicitly saved via the menu. Leaving the options screen and selecting the "save" option on the dialog did not save the options values. I had to bring up the menu and select "save settings" to get them to save.
+ when my blackberry is in a holster (as it is most of the time when I'm traveling) the app did not continue to map my movement. Is there a way to keep it active while the blackberry is holstered?
The holstered behavior is the showstopper for me right now. With it active while holstered, I'd be very happy with the app.