Personally, I don't really think about it. I wear what ever jeans I happen to pull out. When I have done 50 mile endurance rides, I have put on some half chaps to protect my calves. Especially on wet or snowy rides.
Those jeans are amazing, but I can't justify paying $200 for a pair of jeans when I can get extremely high quality riding breeches for less than half of that. If I knew that they would be comfortable, not shrink, not wear out fast, not ride too high up my waist, not look dorky, and not be uncomfortable, I might consider it. Now if anybody finds them on half price sale, let me know for sure.
I would love to have a pair of those $189 jeans with the full seat.. but I cannot pay that amount for a pair of jeans. I am female and have had problems with jeans.. I don't have a problem with the legs coming up.. but with the seams on the inside crotch a real PAIN!
I found the wrangler Q-baby's to be pretty good. They are fairly cheap and stretch with flat seams. I am not small yet not big weigh 170 size 10 and they do well for me. Just my 2 cents!!!