Yes, intonation on a floating bridge can be a pain in the ***.
This piece should make the job a lot easier, unfortunately it did not.
I own an Original Floyd Rose and a Recessed Floyd Rose Original, alas with neither one it worked better than without "the key".
The idea is fantastic but it could've been manufactured better (maybe there is a german counterpart? :P). The little "clamps" that suppose to hook on the Floyd unit seem to be too narrow so when you screw it into place it visually moves down with the result that you "fine-tune" your string. So when you intonate to perfection and release the "the key", your string it slightly out of tune because you've been fine-tuning it while intonating.
Also, when screwing it in place, it gets more difficult to turn the knob when the tension increases and you cannot have low tension because it will flip off.
Conclusion : It did not do the job faster than when securing the bridge and intonate the old fashioned way and the piece should have been made a lot better like a good clean solid fit to the back of the floating unit.