The conforming skirts I make work as well as anybodies, I think, better than most, maybe. ;-) They have working thigh AND shin parts, plus I give them a bunch of special operators. But they still have problems with some poses, especially where one leg crosses over another. The "Anton" solution (which seems to be used in the Poserworld skirt above) take all the strech between the legs in the middle polygon (as you can see)-works great for some poses, hopeless on others. Dynamic skirts have other problems, of course, but they can do poses as in the pic, most of them would be tough for a conforming skirt without a ton of hand adjustments.