Use between -0.5 and +1.5 (or more for an overkill effect).
-0.1 to -0.5 it can enhance realism in a unique way - could be used to offset a baked in animated effect in a model or lora
at 0.1 to 0.5 it can enhance details in a unique way
between 0.6 and 1.5 it adds a 3d animated pixar effect
This is basically an embedding disguised as a LoRA, but it's effective. Weight of 1 seems to make many images much better and often more accurate.