I will say that it was easier to get "off the Pepsi" than I thought it would.
I used to feel compelled to drink like 5-6 cans per day.
Now I just have one when I wake up, and that's it.
At first I was miserable drinking water in its place, but now I have totally gotten used to it. For the first 2-3 weeks I was thinking, "Wow this is awful drinking just water", but now I actually like and look forward to the water.
It's just so tough late at night when I suddenly crave the orange juice and have a hard time staying away from it.