I'll have to try it for myself like I said ^^ thanks for replying. According to some research it doesn't help. It fights powdery mildew but that's about it. So on one hand there are people like you who swears by it, and on the other people who say that usually people see what they want to see because they never set up a control group... Even I, when I'll test it this year, I won't be able to set a control group... So it's just a try-out for the feeling, but next time maybe I'll go a little bit deeper and start setting control groups for different factors ^^
I'm thinking of using some extract or syrup as last watering, an hour before harvest. See if it improve taste. Many small things like that which would require in-depth study. Scientific research isn't easy to read either...