I bought this as a replacement of the fender roller nut that I have on my Jeff Beck CS strat.
I use my trem a lot, but do not like floyd rose like trems.
I have a bigsby on a Gibson Les Paul Custom and had lots of tuning issues, that I solve now with lots of nut-sauce.
But for the fender this roller nut is excellent. Keeping my tune very stable.
Only issue is that there are small metal clips that keep the balls in place are fregile. And I had to replace the nut because the clip of the high E was twisted to much that I first wounded my selve all the time, and at the end the balls fell out. So, the system is not perfect.
I keep an aditional nut now with my tools. Replacement is very easy. So if I have an issue with the new one I can replace very quickly.