One of the "advantages" claimed by the authors is that KO doesn't require converting the count to something else. However, the Initial Running Count (IRC) is 0 for single-deck, -4 for 2-decks, -20 for 6-decks, and -28 for 8-decks.
I'm in the process of learning to implement the system, but starting with such a high count is what's creating a problem for me. I play a lot of 6-deck games to practice, and when I go to the casino, initially I'll be playing 8-deck games until I can get good enough to risk playing smaller decks.
At present, I'm overwhelmed when I'm showing 16, the count is -18, the person next to me is complaining about his 15-year-old daughter, and "Happy Birthday Sweet 16" is playing on the sound system.