DOES IT EXCLUDE FOOD YOU ADORE?
If it doesn't' allow you to eat foods that you love, why waste your time? How could that possibly be sustainable in the long run? Torture.
Any eating plan that helps you to lose weight ( preferably from fat ) needs to be something you are going to be able to stick to. If your "perfect" weight loss plan removes every food that you have ever loved, don't expect to keep it up for long. That should be your first red flag that the diet is not going to be sustainable.
So, make sure it allows you to eat foods you love in moderation. If your favorite foods are not included, you will not be able to be consistent.
Even if you do stick it out and lose the weight, the second you eat "normal" again ( adding in all the things you cut ) it all piles back on and then some. Red flag Number 2 post to come.