No DB...This is just an alternative to the claw/screws configuration. It adjusts with an allen wrench through a hole in the trem cover, so spring adjustments can be made without removing the cover. It even comes with a spike you place in the allen screw to mark the cover for drilling.
I never have liked the claw situation, and always felt that, other than a proper nut, this was the main weakness of strat style guitars regardless of price.
It's not so much that I use the trem that much. I just happen to have an inexpensive guitar that has a very cheesy claw/screw situation. The claw is very cheaply made and they did not drill the screwholes deep enough to adjust the tension correctly. This was on a Douglas WRL 590 Floyd from Rondo. It's a nicely made guitar other than this issue.
I have tried the Trem-setter in the past, but the results were less than impressive. There was a slight improvement in tuning stability, but not much.