Board Thread:Questions and Answers/@comment-34012935-20171219015102/@comment-32758234-20171219015659

It's usually better to use 100% Guaranteed Chance, but since the chance is raised on Uber/Epicfest, you could get good ubers, not limited to one gacha set.

So what I'm saying is this:
 * If you want a specific uber from a specific set and there is a 100% chance, go for it.
 * If you just want ubers (and probably the exclusive ones; Baby Gao (Uber Rare Cat), Miko Mitama (Uber Rare Cat), Dark Mitama (Uber Rare Cat), Shadow Gao (Uber Rare Cat)), go for it. 3% -> 9% on these Gachas: Uberfest (Gacha Event), Epicfest (Gacha Event)