Ok, I did the IF for three days and it was easy to do, but then yesterday I woke up famished, so I think it's important to listen to the body. I ate. Came in the same calorie-wise as I always do.
See, for me, eating 5 meals a day or doing IF are both doable for me. I will just go by how I feel. If I really feel the hunger in the first part of the day, I will eat. If not, I will not. I will also keep IF in mind on days I know a big dinner is planned. Like, in a couple weeks we are going out on a dinner date with friends. Instead of picking at my dinner, I will enjoy it by using my calories of the day then. I will still try to make it a good choice meal, but I won't fret as much about it taking me over for the day.
I also think low carb eating just makes IF so much easier. Low carbers (and I'm not even a grossly low carb eater - I still average about 100 carbs a day - mostly from veggies and an apple) have more balanced blood sugars, so spreading meals out like that is easier as their sugars don't spike.
Anyway, just my thoughts on it.