I use alot of flouro. For a while I was not really sold on it making a huge difference but then I decided to try do a test. I would rig two spinning rods up with shaky heads, 8# test flouro on one, 8# mono on the other. I fished these for three trips in a row on a lake where I fish the shaky heads around docks a lot. I fished the docks with the mono first then would switch the flouro. The mono did catch some fish, but i lost count of how many times when I did not get bit on the mono rod and then switched to the flouro I would get a fish. That sold me so now I use it a lot. I have tried a bunch to and like Seguar Invizx the best.