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

Do not buy this toy. If you are given this toy as a gift, return it for store credit. This is a flimsly and poorly designed stack of platic and paper. The secret door doesn't work, the elevator doesn't slide and toys get stuck in there. The suggested 10" batman doesn't work with the zip line, bungee or even the elevator. The add says "Using new adhesive technology, you can set up the Batcave on just about any wall" so they want us to glue this thing on to a wall.Please don't buy this toy.
Negative

This book should have been written more as a novel than a how to. This book goes into story like dimensions and there are others better written on the subject.
Negative

Four pages of the book was missing. It just happened to be the formulas that my husband needed. Fortunately he was able to copy our friends book. But I will hesitate to buy another book like this again.

Negative