My Mum introduced me to these this Christmas time. She was roasting all manner of joints for guests and family and when I saw her with a joint in a bag and throwing onions, peppers and mushrooms etc into it, I had to find out what was going on! Well, the meat is tender and juicy. The pan is clean as is the oven. This is truly the perfect way to roast. I have ordered several packs of different sizes and have not been disappointed. This is a fool proof way of cooking a roast. Just as my Mum warned me though - when you pop the tie on, take the air out of the bag, so that the bag doesn't over inflate and hit the edge or roof of the oven. Follow that rule and you genuinely can't go wrong.