I have fasted several times before, but never anything close to 40 days.
I would love to share with you my experience, and to answer specific and even personal questions, if you have any.
However, at the moment I feel it would be premature of me to "look back and summarize" my experience, as it's not yet behind me.
Breaking the fast is a sensitive part of the whole process and may change my overall view on it. Also I'm asking myself whether assuming I'll practice a "perfect diet", the benefits of the fast will remain.
I did achieve significant and scientific benefits from the fast. In a month, 2, a year or more, I could look back. If the symptoms are healed by than, then I'll say that this fast was the biggest winning of my life!