The Core gravel panels (for our driveway) were very easy for us to install. We used coloured gravel, and in the 6 months that we have been parking and walking on it daily there has been no movement or stone loss at all! We are very happy with it. We are waiting for the spring to be able to install the Core grass panels. I tell everyone who asks about our driveway about Core Driveway and send them to your website.