My parents have both used this diet with some great success.
My father is 61 and is now back to the 165 lbs he weighed when he married my mom.... However, my dad was never really overweight in my book, he hid it well, but what was more scary was his high blood preassure. It just came out of nowhere it seemed, and he was taking medication to correct it, but he hates taking pills, and would sometimes try to avoid taking it--which annoyed me. However because of this diet he no longer needs to take his medication. Just with the diet and running on the treadmill every day he has lowered his blood pressure to the normal range.
My mom who is 56 had adult onset diabetes. While the diet has not removed her need take insulin entirely it has really helped her bloodsugar numbers. They have been great lately. She hasn't lost as much weight as my dad, (curse those men for always being able to lose weight faster then us women). But she is sticking to it.
The diet isn't bad. Some of the recipies seem kinda whacky--but a few of them were really delicious. Some of them were scrapped outright--lol...but all in all I think my older parents have been really pleased with the results, my father especially.
I think this diet is more about eating healthy and being healthy than weight loss. I believe as the doctor said, he was looking for a diet to help his heart patients that was heart healthy--beacuse the Atkins is not at all, it was just a side-effect that that they ended up losing so much weight on the diet.
I wish you success Mulan, and the others who are trying this diet. I think it sounds like a good plan.