I do ok for myself, I do make a mean pwo shake.
I tried his cookie recipe which was mostly natural peanut butter, protein powder, and a little bit of oil and the things turned to dust promptly after coming out of the oven. I tried another of his recipes which was supposed to be this cheesecake thing and it was like a plastic brick. I've had success with some of his recipes but I just think he gets a little overly ambitious and optimistic at times.
I've actually got pretty close to a 100% success rate with recipes I've taken from D&S members though.