You may or may not get a broad range of opinions in response to this post.
I have used them more than once on Fenders. I do like them in that they are well made and easy to use. As far as performance, it is my opinion that the change in tone is somewhere between minimal and modest. Whether you think that change is better is up to your ears.
FWIW, there are MANY threads on this very subject. A quick search would give you more insight than you probably care to read.
Badass bridge I noticiable effects? 
