Instructions: In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.
Input: Unfortunately, these seem to be slightly smaller than the ones found in big box stores and they do not work on our knobs. I was excited about the color options, but they do not work on our old glass knobs that are hexagonal rather than round. If you have a newer home with typical round doorknobs, these probably work fine.
Output:
May not work on old knobs that aren't perfectly round