The Vibramate literally takes minutes it install, leaves no holes or marks on your guitar and is a nicely engineered piece of kit.
Make sure you take the time to tighten the bolts which hold your Bigsby to the Vibramate carefully, because it's possible to pull the Bigsby out of whack, causing either the arm / string holder bearing or the string guide roller to bind and not move freely. Make sure both bearings have no friction before you string up, and if they do, tighten or loosen the screws holding the Bigsby to the Vibramate until they rotate freely.