Definition: In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.
Input: We love this new slip-to-grip gray doormat. We put it across our front porch between the front steps and the door. It looks very nice. Unfortunately, due to its being rolled for packing and shipping, the surface is uneven. Different sections are at different heights. We both have balance issues, so we trip on the highs and lows of the mat. We love the color and texture, but it is too dangerous for us. We had to stop using it after two days.

The uneven surface of this mat makes it dangerous to walk on.