I did part of the challenge last week, I didnt have them as HEB choices but I did eat at least 2 pieces of it everyday, broken up into a mullerlight yogurt. And one day I did have 5 as HEB.
It helped me lose abit more than usual, usually my losses are 0.5lbs to 1lbs a week and I lost 3lbs.
Be sure to drink plenty of water though if you do it & have a good supply of loo roll in haha! xxx