I haven't tried the Pitzen but have rarely had an improved cinch fail on me. However, if you are having a lot of trouble there is a product from Loon Outdoors called UV Knot-Sense which you can apply to your knots streamside and hardens almost instantly when exposed to sunlight. I don't use it much at all but it can be helpful when fishing streamers on light tippet, if I do use it I find that the tippet itself will break before my knot does.