Nothing dramatic - you eat less of course but if you’re the kind of person that cooks bigger meals and then eats the leftovers you either need to adjust how much you cook or plan to throw more away. It also lets you plan your one meal better so you often end up choosing something healthier since you’re putting more thought into the meal.
Everyone has different times they prefer to eat but I found for myself eating between 2-4 pm was the ideal time for me to avoid getting hungry in the evening and still be able to work well in the morning.
It takes about 3-5 days to adjust your body hunger chemicals so you end up having to fight through a bit of hunger the first few days but after that it goes away.
One downside is the inconvenience that it sometimes puts on interactions with others who might like to enjoy meals with you at times that don’t sync with your schedule. It would probably not work as a lifestyle for a salesman who did business meals, for instance.