Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: does not work well
Review: it does not grip well because it only has "teeth" on one side. it means having to put a lot of pressure on a jar to get it open. for older people, this is not practical. I have another one that I have had for several years with teeth on both sides and it is very simple to use.
