Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not for amateurs

I have owned this book for several years, but never used it until today when my wife and I made peach preserves. The finished product seems to be excellent so far, but this was mostly thanks to my wife's expertise. This recipe (and for that matter, all of them) does not call for pectin, leaving us to guess the amount. The recipe (and we made it twice) makes half the amount that it claims. As preparing preserves is labor-intensive, I would not try others in this book.