Hello,
I fitted a Buzz-Stop AFTER fitting Mustang saddles, which got rid of the buzz and string 'slide' on the saddles anyway... I just wanted an extra bit of chrome!!!
But I will say, that I found it has increased the tension on the strings and allows you to do large string bends (I still use 9's on the top E), without the string snapping at the bridge. I have also found that the extra tension also gives more sustain.
So I would buy it for the above reasons but not for it's main purpose, which is to eliminate buzz... (If you can't eliminate buzz & string slide by setting up, I would personally recommend Mustang bridge/saddles instead.)