The mat works well on one tiled step that I kept slipping on. That step has a perfect 90-degree angle edge.
They do not work so well on my cement steps that have rounded edges. Due to the packaging they shipped in, the lip on the mats was pressed in a way that caused the edge to bend upward, creating just enough of a bump to trip or drag the mat when walking down the steps. That, combined with the rounded edge of my steps, meant the lip was not flush with the step, so multiple people caught their toes on the mats on their way up, too. It was a danger worse than the issue they were meant to fix. Some reviewers suggested glue, but I dont want to do that on a rented property.

 I cut the lip off of each mat and that is helping them stay in place when stepped on.