How important do you think end-user experience monitoring is in successful application performance monitoring (APM)?

Compute has become the center of so much of life that monitoring has become much more than the old up/down of the past. The experience is critical. It's been proven that being without service in many areas is easier for individuals to deal with than slow or unreliable service.

Compute has become the center of so much of life that monitoring has become much more than the old up/down of the past. The experience is critical. It's been proven that being without service in many areas is easier for individuals to deal with than slow or unreliable service.