Very good product
I would give it five stars but the shippers mistreated the Core Drive package and many grid edges were broken. Thankfully I had plenty grids for my small driveway with gravel project. It was easy to install and does just what we want: hold the gravel in place. I'm looking forward to seeing how it ages, and I hope, for future purchasers, they make sure to have more protective packaging and "Fragile" stickers so clumsy shippers will not harm any grids.