I have been doing Ideal Protein for more than 2 months now. I am allergic to soy and all nuts. I don't have a lot of choices, but I have lost over 20 pounds, and am continuing. Lots of high protein products contain soy! There are some good whey drink powers that are good and soy free. I but them at Walmart.
You can do it. Just think of the goals you have for yourself, and if food is boring, then take up a hobby or 2.
Hope this helps!