I had my doubts at first but this product really works. Cooked a Beef Chuck stew in a cast iron pot - 30min on the stove and 4 hours in the Wonderbag. Meat was tender and stew divine. Kids gave their stamp of approval. During the 4 hours in the bag I took the family on an outing. No need to monitor and be present while the magic happens.
I would recommend this product to a friend.