Nicely made piece of kit, looks great on a traditional style guitar- I fitted mine to an ES335, and it's perfect for that subtle rolling vibrato typical of early rock'n'roll, assisted by some deep reverb or short delay, so the pitch drop gives a chorus effect. Nice.
Note that if you're fitting it yourself, some skill in ensuring no binding at the nut or bridge is needed, and also - I used a Vibramate to save drilling my pristine '97 335, and you need to work carefully when tightening the bolts that hold down the Bigsby, as the horseshoe casting is liable to some slight flexing, and if it gets out of alignment, the main bearings on the string retaining shaft can bind and cause the arm to fail to return to the balanced zero rest point.