Pros:
- Can block movements without disassembling the whole tremolo.
Cons:
- Very inconvenient to rotate the blocking screws. One can't properly do it with only fingers. And when using a tool like pliers, it's getting damaged more and more every time
- Very hard to set it correctly so there will be no small space. So it's kinda blocked from movement back, but there is still tiny space between so you hear the pitch change if moving tremolo back. So, it's blocked, but not really.
- When returning to the initial position, it makes very distinct noize, when the bar hits the stopper.The sound is really loud. And you'll hear it very good in record and in live plays.
So for me it was making only worse. I couldn't completely block the tremolo, and also tremolo started to make an additional noise.
When I was setting it up I just damaged the screws, so it will probably survive 2-3 times more and then I'll have to throw it to the trash.
Can't recommend.