Coming to the end of my 9th week on 5/2 and have lost about a stone/14lbs. Starting to plateu a bit after last weekend (3 days of excess :P) but we shall see... currently at 184lbs (5'11").
After about 3-4 weeks I had to cave in a little and seek some treats other than the SnackerJacks - so always have Hartley's sugar free jelly on standby (topped off with berries from the garden) and a glass of ice cold diet coke (although this might more to do with the heat). Cycle commuting on fast days helps me drive down the weight some more and I feel fine doing it. The day after a fast I'm not so sure as I've had some whoosy moments but again, they were on extremly hot days/evenings. I definitely hit the hills easier than ever and think I'm +1 on my cruising gear!
Overall, this seems to be the easiest and most sustainable diet/WOE for me - I certainly never thought I'd wear a medium top or have a waist less than 36 inches ever again.