My favorite to date was when we were discussing the layout of a generating station during a meeting. We couldn't agree on the orientation of some of the structures, and we had JUST finished touring the area. So I whip out BCN where I'd already downloaded 1/4m Urban (color) maps and ended the argument in my favor.

The pictures were so detailed you could determine the make of the vehicles in the parking lot.

Then I went caching after the meeting.

And BruteForce: I usually switch to the Nav screen when I'm within a few dozen feet of the goal coordinates. I think it's more useful for homing in on the exact spot.