I spent a long time researching after market replacement bridges for my bass. I did not have any confidence in the original bridge. Over time the setting screws would loosen resulting in lowering of the height of the strings until they would buzz against the frets. Any sort of heavy plucking or slapping would exacerbate the problem making it unplayable after about 20 minutes use. I really couldn't wait to ditch the original bridge. So my research led me to Babicz. Solid cast metal, fully locking setting screws and easy sensitive adjustment with an allen key convinced me that this was the right choice. I ordered from Thomann and was pleased with what arrived on first sight. The Babicz is a very solid and weighty piece of hardware, a real step up from the original item which let's face it hasn't really changed much since it's introduction in the 1940s or 50s and today comes across as very primitive for a modern instrument.
The bridge was easy to fit myself and came with new screws for the installation. I'm no expert at setting up but found adjustment very easy with the included allen key. I was immediately impressed and even more so when after 30 minutes of punishing slapping and agressive playing, the bridge settings had stayed rock solid. The locking screws really had done their job.
Some months later I was still extremely satisfied with the way the Babicz had transformed the instrument and my new confidence in it decided me to get it professionally set up for the first time (including a little straightening of the neck) . The guitar tech (hi Kev) down at Denmark Street was quite excited to work on a Babicz bridge for the first time and thought it was very well designed. He whipped the bass into shape and i have never looked back.
I have had this Fender P-bass for about 18 years but the last 4 since i upgraded and then had it set up have seen me improve and enjoy playing bass more.
I do recommend the Babicz wholeheartedly if you are looking to upgrade from the original manufacturer's bridge (and maybe even if you are not). I am a little reluctant to order internationally but Thomann have always looked after my orders and I have every confidence in them.