Product review (4 stars): They work, eventually...
When one is not terribly mechanically-inclined, one appreciates written directions, even if one only consults them as a last resort.  You'd think it would be simple to open a trash masher's door and put in a new bag, wouldn't you?  HA!  Think again!
These are the correct bag for my mother's somewhat elderly trash compactor, but they arrived with no insertion instructions at all.  It was an interesting trial-and-error event getting the old one out and the new one in.  A couple of sentences along the lines of "Bags for Dummies" would have helped.  All that said, the bags DO work well, eventually, and the fact that they are delivered to the door is huge.