From what I saw with the bow, I would only use it if you didn't have a Crab Bow +2 or higher. +3>+2>Uldhan Longbow>+1>NQ Crab Bow.

And I would consider it debatable even against a Crab Bow +1. Uldhan Longbow has slightly more att/crit then Crab+1, but slightly less acc. Not even sure how much those slight differences matter.