Hi,
Yes, I did the full 8 weeks on it. Around a year ago.
I found it was absolutely fantastic in keeping my blood glucose to normal levels, and because I tested consistently throughout, it was very useful in teaching me exactly what foods, when, and in what quantities would send my BG too high.
The other thing it taught me was that I am intolerant of grains, any grain, in any form. That was a big disappointment, but useful to know. Cress tells you that you can eat 5g of carbs with every meal and as a snack, and she positively encourages you to do this. Every time I took my 5g as a grain, my bg shot up. If I took it as potato, or chia, or parnsip, or other non-grain, my bg stayed down. So I have been mainly grain free ever since (with the odd treat and exception. and every time, up my bg goes to silly numbers and takes about 5 hours to return to base)
Very glad that I did it.
But (there is always one, isn't there?) she predicts massive weight loss. That didn't happen for me. I was doing higher fat than she recommends, but I was certainly at, or below the carb levels she recommends. I had been gently and slowly losing weight for about 6 months on very low carb before starting Cress' stage 1. That weight loss slowed even more. By the end of the 8 weeks I had lost only 3 pounds, I think. Where she had expected me to lose probably 10x that.
I suspect this was because much of her predicted weight loss would have been the glycogen reserves and fluid that I had already shed, and because I was higher fatting. Your experience may be very different.
At the end of the 8 weeks, you are supposed to go onto stage 2. Tried it. Persisted. found that I was adding fluid back, and my bgs shot up again.
Again, your experience may be different.
But basically because of my particular combination of hormone issues, including PCOS, massive insulin resistance, RH and type 2, it seems that 20-40g of carbs a day is the most my body can cope with without weight gain (and well under 20g to lose). I sort of knew that before starting Cress's stage 1, so it wasn't a surprise. Many people can tolerate a lot more, so please don't let that put you off.