I haven't had a chance to go inside the new World of Coke yet. I want to go though but don't want to go on the weekends when the crowds are there and just too busy to go during the week (I used to have every Friday off but now I work Mon - Fri). I went into the old one lots of times and enjoyed it everytime. I especially liked tasting all the different products that Coca-Cola sells in other countries (hope that is still at the new place).
I liked the old building but must admit this one is rather nice too - I especially love the suspended coke bottle. In case you didn't know, Atlanta is the birthplace of Coca-Cola and their headquarters are also located here.