It’s been years (2019) since I reviewed the original Fitz’s root beer. I haven’t tried it since largely because with a few exceptions (Sprecher, Barq’s, A&W, & Dang) it’s onward to new root beers I haven’t tried before. It’s been so long since I had Fitz’s, the pride of Missouri, that I had to re-read the review to get my mind set for the diet version. I said the original version was clean, crisp, light tasting with a nice vanilla aftertaste. And honestly, that would be a good description of this one. It’s incredibly light tasting and because it’s diet, it’s not sweet at all. I got a little whiff of aspartame in the aftertaste but unlike a lot of diet drinks, it’s barely noticeable. For a diet drink, this is totally serviceable for those looking to save some calories & considering there wasn’t anything that turned me off and grading on a no sugar curve, it’s an above average drink. If I ever completely run out of root beers to review, I would come back to Fitz Diet if I was eliminating sugar or cutting calories.