I have only been doing intermittent fasting for about a month or so now (4-15-2017) but I can say this about it anecdotally, I am losing body fat and I sleep better. I am trying to keep my eating window between 8:30am-5:30pm, which is a 9 hour eating window, which means that I am fasting for 15 hours every day.
Here is a video that I thought had a lot of interesting information in it about circadian rhythm and I.F.
and another FoundMyFitness lecture that broaches the subject that was also great!
And another great lecture covering fasting!