I just started doing this a few weeks ago, along with counting calories during my "feeding" window (which I actually try to restrict to six hours). So far so good.

I find I'm actually more successful at counting calories on this schedule. I think it's easier for me to completely abstain during the fasting period, and I'm less tempted to snack with lunch and dinner so close together. I've been planning and allocating my calories like I never have before, even though I've tried many carb- and calorie-counting schemes in the past.

I'm also toying around with taking a little MCT oil in the morning to help with cravings and mental focus and give me a little keto boost. It's unclear to me whether or not this defeats the purpose of the fast. Many people seem to think it's fine ("fat fasting") and maybe even a good idea, but I'm not yet convinced one way or the other.

I usually eat lunch somewhere between 12:00-14:00 and then something between 18:00-20:00 in the evening.

That's all, been doing it for about 17 years now and it works great. Although I drink coffee throughout the day.