There is a Coca-Cola bottling plant in my vicinity and most of the Coke sold in this area is from that bottling plant. For about a decade Coke from that plant has tasted watered-down, weak, and flat.
I called the Coca-Cola Company and they said it was the bottling company's issue. I called the bottling company and they said they are within specifications, so apparently there's some leeway. Coke from bottling companies in different areas are sometimes quite good, and if you get a soda fountain with the right mixture it's good also.
Of course I wish Coke would go back to real sugar, especially after Pepsi Throwback, which was great, was replaced by Pepsi with Real Sugar, and no matter Pepsi claims it is the same, it's not--it's terrible, and it's made in the same facility as before. The first Mexican Coke I had a few years ago was terrific, but ones I've had since have tasted weird.
Reason of review: Bad quality.