Yes, I did it and stuck to it for about nine months, some three years ago, and I still keep to it more or less, but not now so strictly.
It suits me. I find it a very natural and healthy way to I eat. Basically, you stick to anything that early man could have hunted, killed, caught or fished for, plus anything that could have been picked, plucked, gathered, dug up, etc. anything edible that would have been in the natural environment, and, as far as possible, anything grown or cultivated organically is best.
So, all manner of fruit and vegetables, nuts, meat, fish, fowl etc. I was told to avoid cereals and especially wheat, though a little oatmeal or rye bread was allowed, and to avoid all dairy produce, as well as potatoes. Oh, and you are supposed to eat offal, preferably three times a week, i.e. liver, kidneys, heart etc.
I found that after a while I really craved milk and cheese. (Eggs were allowed, by the way). And the smell of freshly-baked bread really made my mouth water. It was those banned foods that I found I just had to start eating again. But, I lost nearly two and a half stone, and felt healthy.
Now, I still keep largely to the same principles, but I do eat bread (wheat) and freely use all dairy products. Plenty of fruit and green vegetables are very important, as are root vegetables, at least twice a day.
I enjoyed it! It was recommended to me by a friend who is a nutritionist. Even so, I felt that some carbohydrate must be essential, and I did eat some rye crisp read, and a couple of oatcakes most days. I avoided using butter if I possibly could. Don't miss breakfast. That's important.and also, instead of eating two or three large meals a day, be prepared to eat a little snack when youbegin to feel hungry. Every snack should contain protein in some form. I ate a lot more nuts than usual. Almonds are particularly recommended. Also, not too many peas and beans, for some reason which I forget.
I recommend it as a diet to lose weight and as a way of life.
http://ultimatepaleoguide.com/caveman-diet/