define "worth the money"
because depending on the level of willingness to get familiar with the internals of their pews you're going to get a different answer from everybody.
to me, no, because like duck i'd rather do it myself and learn the requisite skills along the way, plus a good gearbox alone isn't going to make the gun amazing, it'll definately help a lot especially having decent compression but you don't need to go to UA for that.