These really do work really well! I have found if it's a tough job that requires a lot of scrubbing it's easier to cut them into smaller pieces to make it easier. I hadn't tried any of the new ones so when I found this multi pack I decided to get it. While I don't really see much difference between the original and heavy duty ones I definitely love the foaming one for the microwave and bathroom. The only thing I don't like is how easy they fall apart when you have a really difficult clean up like old kitchen grease and things. They still get the job done though.