So far I've hunted with the same set for one year without any failures, and it's just as adjustable as day 1. I like having my nocks adustable for a couple reasons. When my string creeps and my nocking point is 1/32" off it bothers me! LOL! Because I shoot 3 under, I like being able to adjust the bottom nock to the size of arrow nock that I use. It seems that if the nocks are too tight, it causes flight problems for me. I also like being able to set my tab right under the bottom string nock.
I just wanted to share. It works for me, but it may not work for all. Feel free to ask questions!
Ryan