I made the switch to fluoro leaders 3 or 4 years back after Mr. JR gave me a couple to try, mainly because it was costing me a small fortune for the wire leaders I was using. I always used the Stringease leaders and they're a real quality product, but would often get kinked after scrapping with a musky, and once that happened I wouldn't use them again. Trouble was, they're about $6 each and if you have a good day on the water and land several fish, it could cost more $$$$ for leaders than gas for the boat.
I now use the 130 pound Seaguar fluoro and make my own leaders with quality hardware, and you can land many many fish before they need to be replaced.
The initial outlay for the fluoro seems expensive at about $55 for 50' plus the cost of the hardware, but in the longrun I know for a fact I've saved alot of money.