The only good thing I can say about these door stoppers is that they're not expensive. But otherwise, I really wouldn't buy them again since they didn't work very well for me. It did work well for the other reviewers, but here are the reasons for my low rating:
First, they're made of this kind of rubber that smells really bad. Second, some of its bits fell off after just a day of usage (like the experience of one of the reviewers here) - which is not good for me since I've a baby crawling around the house. And lastly, they don't work well with carpets since my 10-month old baby can easily move the door even if the wedge is there!