As the CM of my country, a perfectionist, a Geocacher and a car aficionado (grown up in the middle of cars, including amateur rally races, as my father was a mechanical), so I tend to take Waze to (at least) two extremes:
- from the "rally" experience, I try to ensure that Waze gives me the simplest and most correct instructions in such a way that one could do the trip without looking at the device. My device is on the bottom of the dashboard and I rarely look at it. Everywhere I go I report every single thing that can be fixed - street names, double instructions, missing instructions, roundabouts that can say straight/left/right instead of nth, etc. - so I can then go home and fix them. (psstt don't tell anyone, but having automatic gear frees up a hand to write down some cryptic and iOS auto-expanded user reports. So yes after two or three trips through a certain route I know people can fully trust waze. And then I try to change my daily route a little bit every day so I can go through different streets and capture some more stuff to fix.
- from the geocaching side, I do usually push the luck and tell waze to route me to the cache coordinate and just go, wherever it will take me. It's been fun because it either gives me points nearer to the cache than the owner knew, or puts me into mud roads that I can "pave" so other geo-wazers can later use to reach the cache. (my rule of thumb is that 4x4 trails are only allowed if a regular car can drive it most of the year, any pure 4x4 trail that requires a real 4x4 (instead of those pseudo offroads like the nissan qashqai) is usually deleted from the map to avoid people stranding themselves.
From the search perspective I don't use waze^wbing at all. I drive either to my geocache points, or to foursquare. Maybe more because as a SU I can also fix the foursquare POIs. And do a lot of routing based on the map's long-press-on-segment, hence why I also make sure the right landmarks exist so people can locate themselves on the map with the help of those landmarks and the city names.