I use one to keep on course, when not covering a long distance and where navigating aids (like roads, rivers) are abundant. I carry a lensatic alway, but find it less often used. Look at "adventure racers" and see that they use a very simple thumb size compass for the same purpose. Just stop and check as often as the terrain dictates.
For the first time this year, I found a variance in readings between compasses. My brother and I were hunting, and as we struck out we laid all 4 of the compasses we carry, knowing they would all say the same thing. Ooops, the one he was relying on was several degrees off. How? no clue, but it made me recall why we did that in the first place. It is amazing how sure you can be that your compass is wrong when you are out at night, and this equipment check can save a lot of time coming home.
Paul