The absence of overall challenge ratings (CRs) with each trap, takes away from much of the purpose of having premade traps for a GM to use. If we are going to have to calculate it all anyway then why wouldn't we just make our own traps rather than use traps publicized by another person.

Calculations take time, that is supposed to be getting saved when using something pre-designed. It is for the loss of this valuable resource that I have given a poor rating of this product.