FYI: Sweet tea is not SWEET Tea if it is not sweetened...also it has to be sweetened with sugar (from the cane) and sweetened while it is hot/warm after it is brewed. Arizona sweet tea is NOT the same. But if I cannot find anything else, I will drink the Arizona southern style tea.
I am from the south, and like Jillybean said it is a great substitute...Some McDonald have a stronger brew some a little weaker.
I love this stuff!
Also Thiti...try another McD's for the chicken sandwich, sometimes one location won't make it as good as another. For example, the first time I had the Iced Coffee, it was DISGUSTING..I would not try it for the longest, and then I finally tried it at another McD's and it was great. I think that the Iced coffee's are really strong