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

This book was brand new when I received it. However, it did not arrive for 20 days after I ordered it.
Negative

Author doesn't believe in any biological interventions and feels you should just accept you kid's disability and get on with it. Needs to spell check his work also.
Negative

I've owned 2 beds for over 2 years now and both beds have held up extremely well considering the amount of constant use they've had. One of beds I actually sleep on daily (more comfortable than my regular bed). I had it over 2 years before one of the inner baffels gave way a few weeks ago. I immediatly ordered another bed without hesitation. Very comfortable and super easy to use, with the built in pump, it's a snap to set up and deflate. Love this bed!!

Positive