I am currently reading the alchemical items' chapter, and I find the "Operate Activation, no cost" and "Operate Activation" Activation entries a bit confusing. It may seem minor, but at every Activation entry I have to make the mental effort of telling myself "okay, there's this one sentence hidden in page 359 telling you need to use 1 Resonance point to activate an alchemical item". Stating "no cost" in the Activation entry is a bit counter intuitive. I fear that some players with short memory will forget that Operate Activation takes up a Resonance point until they see a "Operate Activation, no cost".
It may be easier to read if the entry reads "Operate Activation, 1 RP" and "Operate Activation" instead of, respectively, "Operate Activation" and "Operate Activation, no cost".