one thing that i have not noticed anyone mention is that the number of wraps made at the start of this knot. I have tested this knot numerous times on the line testing machine in our fishing club. To many wraps can also weaken the knot in a sense-yes to many is bad not better, to many wraps dont allow the braid to pull down tight.the criss cross pattern tightens closest to the end being pulled but doesn't tighten the wraps as tight at the far end ,if to many have been made-hope that makes sense. what can happen is now the knot seams good but after a bit of stretch back and forth the wraps that were not fully tight at the start begin to send the slack down the line causing the knot to let go.-