Critiques of Ken Wilber

Here are some criticisms of Ken Wilber:

http://www.kheper.net/topics/Wilber/

Here's a site with lots of stuff on Ken Wilber. There's even an
article entitled The Cult of Ken Wilber here:

http://www.kheper.net/topics/Wilber/Cult_of_Ken_Wilber.html

Here is an even larger collection of criticisms:

http://www.integralworld.net/readingroom.html