They're GREAT!!! I use them on all my Strats and Teles; I haven't broken a string since I started using them 7 years ago, and they stay in tune much better because there's no string "catching" at the saddles. The best investment and easiest improvement you can make to your Fenders.
I installed them on my strat and have had no problem whatsoever. They work great and look good. The problem I had with the original saddle was that it was starting to rust. I guess I sweat too much. Doesn't seem like this will happen with these saddles.
I put some on a PRS CE24 and couldn't tell the difference.
I stuck some on a re-issue 72 thin line tele and it was night and day, massive improvement !
Stuck some on a Mexican California strat...magnificent !
After breaking 5 strings during a one hour gig almost 10 yrs ago I got some graph tech saddles on my main strat-I rarely break strings even to this day-A great product for sure.