I don't write many reviews but after reading some negative reviews I thought I should share my experience with these bags. Some of the negative comments were that they don't fit properly. These bags are narrower and a bit more difficult, but it's worth the extra minute to attach the bag. I love that they are fat! I've never had a problem separating a bag and I've never had to clean the inside of a Kirby bag because everything fits in these bags. A few tips: Tear out the notches at 12:30 and 6:30. As you slide the bag onto the hose mount, grasp the top of the square cardboard panel with your thumbs, with the rest of your fingers in the folds of the first layer of the bag just behind the cardboard. This protects against possible separation of the carton from the packaging. Before replacing the bag, make sure the cardboard panel is flush with the vacuum attachment panel. This may take some convincing as the rubber hole may be narrower than the brand name but once on it stays put.