I tried this over the summer, it had its pros and cons. It's a 4 hour eating window so I had 2 large meals a day. I was cutting and I thought it turned out reasonably successful, I got down to around 8%. Throughout the day i had around 20 grams of bcaa's. It may have been all mental but I felt a lot weaker in my workouts, and significantly lesser pump, which is a given since you will not have eaten any carbs. I say if you are cutting to go ahead and give it a shot, but if you are bulking I would not recommend it. For the first 2-3 days I got pretty hungry, but then my body adapted and it was no problem.