I have to agree with Fish Eagle on this one. They are a horrible idea. The point (to me) of a micro is to hide a cache from muggles. I do not enjoy hunting a film canister on a cliff face after bundu bashing for a 100 meters, with the GPS jumping around and 3 meters away is 20 meters up. There is small chance of being muggled, so why make it a micro? No matter how good the CO thinks the hint is, I've seen more, between two rocks, or next to the bush, or under the boulder, where it could be describing everything within sight. Having a nice treasure at the end of the hunt is nice, and having a DNF after a significant hike isn't. But then I'm not the best at finding caches.
Still, if the point is the destination, why would I want to spend my time there hunting for a micro for 20 minutes rather than enjoying the view?
my two cents.