The heavier Seagaur stuff is not very good. It has terrible knot strength. Just got off a 3 day off-shore trip. Captain basically told us that he would rather see us use straight mono than a Seaguar leader. Several used it anyway and they broke off at the knots with every hook-up. I used Yo-zuri and had no problems. We did use some double leaders on Bluefins and that held up fine. The single leaders all broke.
What knot(s) on which weight Seaguar were failing? Knot selection on the big stuff is a bitch.