Well I ate half of one of those little tubs (2 servings) that had only 200 calories and supposedly 4 grams of net carbs all together. And according to my ketostix I'm still in ketosis the next morning so I guess its a safe little snack as long as you don't over do it. And since its made with splenda there are hardly any calories.
So my conclusion to this very scientific experiment is that the ice cream is delicious