Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Umbra Coretto 24 to 36-Inch Decorative Tension Rod, BlackThe rod is really good looking. However, because it is so thin, the weight of my shower curtain keeps causing the rod to come loose. If I had any idea, I probably would not have bought the rod. However, my shower is at the wider end....so maybe a person would have better luck if their shower is closer to 24".
Negative

Koontz can write. But he sucks as a story teller. Books are supposed to have a COMPLETE story in them, no? Well this one has no ending. No end at all. These 2 detectives are clued in to the fact that Dr Frankenstein exists, and is creating his "perfect race" to some day kill off all humans. That's it. You meet the original, now educated and "at one with the universe" Frankenstein's monster, you meet the main characters, and they have some conflict. That's the whole "story" in this book, which it really isn't because the basic elements of a story are a beginning, middle, and end.
Negative

This book is endlessly fascinating because the Manson story is endlessly fascinating and because Bugliosi (the prosecutor) and Curt Gentry (the real writer) manage to avoid sensationalism. But it's really a pedestrian work, eminently readable, but nowhere near the level of Capote (In Cold Blood) or Mailer (The Executioner's Song).

Positive