Hey Kevin, Yahoo here. Ihave used tuffline for about 5 years now and think its the greatest thing since sliced bread!!! Now, I do use it only in the salt, but it has no stretch and when you set the hook, WATCH OUT, Its a direct connect with the fish. Have never had a problem with it putting a groove in my guides and I fish about 150 days a year. I havent fished it in the rivers yet due to the fact that this stuff will not brake and we all know how these snaggy rivers can be!!