Elizabeth, Normally when you hit goal, they will add exchanges week by week to your plan, in a period of time called stabilization. If I recall correctly, the first week they add unlimited veggies, and then an extra dairy, then an extra fat and half a protein (if you on a plan with 2 proteins already, if you already get 2 and a half you don't get any extra) then a fruit, then a starch and finally a second extra fat. If at any point you are not within 3 pounds of your goal week they don't give you the extra exchange. So stabilization can take more than the 6 weeks. Then some counselors say you should wean yourself off the bars, but then they don't give you any extra food if you do (which I think is just a ploy to get you to buy bars for the rest of your life).
Other counselors just said to go to one bar a day if your weight goes over the 3 pound range. Mostly they try to keep you plus or minus 3 pounds of your goal weight.
I stabilized on Blue which is just slightly above Gold. I did try Gold a few times, and it works OK for me if I am not exercising much but is not enough food if I am. Of course the portion sizes are a bit different from the numbered plans, so you really should have the book if you are trying to do Gold.
ON LAWL since 9/5/2006