I love this jar opener.  I always struggle to open slippery jars, and this product definitely helps. I was struggling a little at first to use it, but then I noticed that I had to make sure to keep it completely flat so that I can use it with ease.  I do wish that it came with some type of protective cover so that it can cover the "teeth". Just afraid a little one will get hurt it they grab a hold of it, but other than that its a great product.