I follow a ketogenic diet. Cheddar Moon Cheese is my favorite, and with only one carb per serving, it's perfect! It's made with cheese - just cheese - and is a perfect replacement for chips or other crunchy snacks.
It's really crunchy and really cheesy, and like most cheese, it does make your breath smell funny, so don't snack on it before a date.
The only drawback is that it's pretty expensive - about five dollars per bag, and there are only a few of servings in each bag. Still, it's ridiculously tasty and meets my nutritional goals perfectly. I love it!