Today, 10/19/11, is day #10 in my Fast 5 adventure. Day 1 and 2 were OK, day 3 was a day full of headache and general malaise, days 4 to present have been OK. A couple of times I felt very hungry and broke my fast an hour ahead of time. Over the weekend it was very hard to resist the temptation to snack (tho' I did). When I'm at work the distraction of my job keeps my mind off food.
Curiously, even a small meal or snack at my break fast is pretty satisfying. My hunger is quite strong by the time my window opens, then a little bit of food quashes it. I actually force myself to eat the equivalent of 2 meals during my 5-hour window so I won't be ravenous the next day.
I've dropped a couple of pounds. This may be the kick-start I've been looking for to break my year long plateau.