The 70% rated strength isn't very good, compared to some other knots. Also, some lines work better with one knot than others do. This past summer, I changed brands of fluorocarbon line for one fishing rod (baitcaster, for "Shaky Head" application). I'd been using a Palomar knot with zero issues, but immediately had two knot failures. I could tell because of the curly end on the line. I changed to a Trilene knot...or maybe it was an "Improved Clinch" knot. Pretty similar. Anyway, no more problems.
Major problems with knots are 1) the knot itself cutting the line and 2) scorching the line while tightening the knot. Different knots do different things better...or worse...making them more or less wonderful for each type of fishing line. The Anchor Bend looks to me like it would tend to cut the line. Google "fishing knots" if you want to experiment!

Steve