I don't think any diet is suitable, to be perfectly honest. This one has had its fair share of pain involved. The first week we were both feeling quite ill... though persisted and it all got better. After a few weeks of stuffing around and wasting lots of food with trial and error meals, we ended up with a nice list of meals that fit within the foods we like. What we missed initially was that all the things like herbs and spices, can be used, as long as they're fresh / dried type. Nothing bad basically. Sauces and other things are also ok, providing their also low fat / no fat types.
After learning all these little bits and pieces which aren't in the books, suddenly we started making yummy meals, and getting a routine with it all. It still hurts at times losing weight. Stomach pains, etc... but it works and works well, and is relatively healthy with the 100 all you can eat foods available.
I literally stuff myself with food, and am still losing weight. It just took a few weeks to adjust and get a grip on it all. Our weekly shopping cost has decreased as a result also, which is nice. Helps pay the bills elsewhere.