Negative opinions go over much better when your argument can convince others with more than saying something sucks. Detailed reasoning and experience etc. It also helps to not mention votes.

Yes, however, the interest on this subject is minimal, so I won't bother anybody with my analysis. I bought this book and I sent it back right away, unfortunately.

Eh, I see few enough negative book reviews that ceteris paribus just this much would be enough. It takes time to read a book.