Thoughts on the HCG diet?

I have some weight to drop and I am going to see a nutritionist on Monday morning. One of my friends has been on the HCG diet and told me it is working for her. The nutritionist is also offering this diet program. They have been open a long time and are well known in town so I don’t think they would offer a snake oil diet. Also nothing I find on line says its a scam. I’m just looking for more opinions. Yes I know what it is and what it comes from. I a also aware that it is a very low calorie diet. What are your experiences?