Yes, I used to follow the zone (for about 5 years actually)...I gave myself one day where I would eat foods a little heavier on the carbs (pizza is my favorite food) even
I was at my lowest adult weight ever, and felt the best I had ever felt in my life!
Sadly, after a few years in college, I got away from following it but I do try to stick with it when I can these days - I just need a little more motivation because for me it takes a LOT of planning ahead
It's actually not all that hard to follow...especially if you are going with the plate/eyeball method - place 3-4oz. piece of protein on your plate, fill the rest up with veggies (and some fruit if you want), and then have a sliver of fat...
The Zone has recently revamped their web site and took down their forums temporarily, otherwise I would say you could visit their forums there for some more detailed advice. They do have a Facebook page though and I believe their recipes are still on their main page. It's definitely a good idea to get some recipes ahead of time because I've found it's not incredibly easy to just throw a zoned meal together when you're out and about
Let me know if you have any more questions, I can definitely help out