The disadvantage is that you have to hold your victim still for the process, where they may break free of the pin - or you may find yourself interrupted by their allies.
You may take this perk a number of times equal to your Stamina score.
Stomach versus size A predator's capacity for eating is generally limited.
Those who have been absorbed or soulvored may only make one attempt per day to break their predator's hold on them, though additional attempts may be granted if multiple people are attempting Reform Other, while digested or otherwise dead characters can just try again immediately though each attempt, including the first, still takes an hour.
Or you may suffer from the Orbs of Utter Devastation! This means you have huge guts.
These bonuses are capped at the Base value of the stat in question.