Everything Coca Cola! Coke rules and Pepsi sucks. That's my story and I'm sticking to it!
If you're a Coke fan this is a must visit when in Vegas. It's right on The Strip so why not? Plus, on a steaming hot day it's nice to take a break in the World of Coca Cola for some nice air conditioning and cold samples of their "sodas of the world" selection. I have done this a few times here and there are like 16 different varieties. Some are downright nasty tasting and others are surprisingly good and wish they offered a few of them here in the states. Based on what country they are from I guess their palates are way different than here in the USA. Hey Italy, what the heck? Yuck.
If you are a Coca Cola memorabilia collector this place is your mothership. All types of shirts, toys, magnets, hats, cups, clothes, and assorted trinkets. Be prepared to pay tourist trap prices though! Take a picture with the big Coca Cola Bear - at least that's free if you use your own camera. Definitely worth it to drop in and walk around the place for a bit.
As it is, I am a Diet Coke and Coke Zero fan. Lately I am addicted to the Cherry Zero Coke. I just can't stop!