I have not tried one. I have tried Quest bars Cookie Dough - these are a problem for me as I used to count the net carbs (4g) and go hog wild - I think I ate 3 boxes of 4 in one sitting once for fun - it's just kind of the way my mind works. Hopefully the "Keto Protein Bar" is better - The ingredient list looks pretty impressive as far as not a lot of man made chemicals.

Continue trying them and see if your level of hunger is generally increase, decreases to stays the same. That might be a good experiment to consider any ill effects.

I may try one next time I see one. Currently I'm practicing not eating any form of sweetener (I see monk fruit there - twice in fact) but I'd be willing to forgo a day of not hitting that mark. Who knows! Perhaps others here will have experience with them