Lol, yea, as I said, you do need to route out a considerable portion of the body.
IMO the benefit is the thru-body construction makes your whole bass resonate a lot more and improves sustain noticeably. The tone is outstanding. And the fact that each string is supported by an individual post or "finger" as they call it, separates their vibrations which enhances individual note clarity. Chords also sound extra crisp and piano-like.
Is it necessary? No. Do modulus basses really NEED it? Probably not... Is it really cool to have one already pre-installed on a quantum? Heck to the yea! It makes it respond really differently (in a good way) making a nice bass even nicer. IMO...
But I wouldn't probably ever go have one installed in a modulus that didn't already have one. Just too big of a mod to trust someone not to mess up.
That being said, I love my quantum and wouldn't swap the bridge out for anything else, even if it was possible.