Not a "must have" mod indeed, but still an important one if you care about realistic ship's behaviour.
As noted by Targor, this mod deals with stock ships sim files. Not many mods (if any) do alter the same files, so it is hard to believe that the reason for the CTDs reported by several users is to be blamed to mod conflicts.
I wish TDW could resume his work on the mod, and see what is wrong with it