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

The best thing I found in this book is the picture on the cover. Well, actually the uncropped version in chapter 5. Beyond that, I found everything else to be non-practical from a design perspective. A photo of a filthy dust collector area when discussing the advantages of central collection or electrical wiring that would never pass inspection is typical. I'd rather see plan views of real shops that work with reasons for the decisions made.
Negative

The directions to put this together were unclear and failed to note that you need to use really oversized bags. After a few uses the sides have already broken. The clips are really hard to put on and off the the rack.
Negative

Maybe my husband is bigger than normal but we had the hardest time getting this on. Once it was on we wanted it off pretty quick. The vibrations weren't very strong and one of the vibes was stuck in the on position so we had to remove batteries to turn it off. I didn't get any benefit from it and I don't think he got much.

Negative

