I have worked for multiple large and small companies who thought NPS was a valid metric for customer feedback, and in my experience it has told us little to no

I have worked for multiple large and small companies who thought NPS was a valid metric for customer feedback, and in my experience it has told us little to no information even though management has generally said we have to be at X to be successful. When I worked for Apple Support the best in breed was a five point scale with a neutral midpoint and multiple questions on different axis, just as the wikipedia article stated, and I felt it was a clear and straightforward method of measuring customer satisfaction and in some cases quality, so that is what I recommend.