Sorry about the ad-hominem, but I think it's relevant to keep in mind that this is the guy that proposed that you could manifest one million dollars into your life just by declaring your intention everyday.
Well, last I heard he was making $40K/month and he had received valuations of $1-2M. Pav says some crazy stuff but it's usually backed up by his experiences.
How did you reach that conclusion from what he said? From what I remember he loved it while on it, and noted improvements in mood and concentration, in addition to having time for additional hobbies such as cooking.
He switched back to monophasic several months later so that he could spend more time with his family during their traditional awake hours. He also simply got bored of being awake when no one else was...
I was a little harsh I suppose, but here's what he says:
"The #1 reason I decided to call it quits is simply that the rest of the world is monophasic. If most of the world was polyphasic, I probably would have stuck with it. Obviously when you go polyphasic, you fall out of sync with the way other people live. You’re awake most of the night while everyone is asleep. If you sleep like most people, then the hours you’ll gain from polyphasic sleep will come in the middle of the night. And as I gradually learned, nighttime hours are not the same as daytime hours when you live in a monophasic world."
His conclusion: It sucks because life isn't set up for that sleep pattern.