I used Tuff line back in the 90's and it worked good, but I prefer 80 lb Power Pro now. Last 3 years in Kodiak we caught tons of flatties and it never failed us. It holds knots well if you double the line where you tie the knot.
Don't know if I'm going to bother this year. After having the native longliners rape the strait last year the week before our season started, I wonder if the same will happen this year. We fished 11 days and caught 2 fish. Everyone else reported the same. It was a horrible waste of time and gas. Hey, at least the weather was good!
Rick