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

The Macally PS-AC4 Power Adapter would not charge my PowerBook. I tested it with a multimeter, and found that it had an open lead.I contacted Amazon (even better, through their web site - no waiting on the phone or waiting for an email), and they shipped another.This second one had the same problem as the first.I contacted Amazon again for a refund.The product was junk, but the service was excellent!
Negative