I went to that place when I was in the ATL for 3 months a few years back. I can also vouch for how foul Beverly was good lord! I think a reasonable fair few of the EU Coke products were horrendous tasting.
Did you get your little souviner glass coke bottle at the end? I still have mine here next to my desk.
If you are still in ATL or going back again any time soon check out the sweet water brewery that's a cool place and you get beer tokens for many delicious beverages and a cool glass to keep