I bought the KME knife sharpener up at Denton Hill, but like some of the others above wasn't really getting the kind of results most of you were getting. After reading this thread last night, including his offer to talk anyone through the process, I called Ron. Within 10 minutes I had produced the sharpest knife I've ever achieved. Great product, great guy.
One tip he gave me was to take a felt tip marker and run it down the cutting edge of the knife you're working on. Then work your stone along the knife edge at whatever you think is the right angle. If the ink comes off all the way to the cutting edge, continue through the method in his video. If not, your choices are to continue to work at that angle, with one of the aggressive stones until you actually take enough metal off to achieve that angle, or, assuming you're not devoted to that angle, increase the angle on the stone until you take the ink off cleanly, and then work at that angle.
I was working at 20 degrees. Using his method, the blade turned out to be 25 degrees, and was razor sharp within 10 minutes after that adjustment.
Again, great system sold, and backed up, by a great guy.