I really like the simplicity of these tabs. I did wonder, and do now, about the longevity. Spent an extra few minutes at the beginning trying to uncover the double-sided stickiness, but realized they are only sticky on one side. The carpet tiles I used are backed with a rubber-like coating, so they didn't shift even without the Flexlok Tabs. Now that everything is installed, I think it was the combination of the tiles I ordered via Wayfair and these tabs that made the installation so relatively easy. Eight boxes installed in two days. By me. Alone. Even with my Lyme arthritis, sore knees, exhaustion, and achy body. The drop of one star is for the price. I think these should be closer to about $9.99, not about ten times that amount. I hesitated and eventually bought them since they were recommended. If you're going to do a project, do it right, after all.