Really love this product! We struggled with our parking area for years – gravel washing away in heavy rain, muddy spots, and weeds growing up through the gravel. Putting down the 60-40 CORE Gravel product was a great decision. We no longer lose gravel in heavy rain. In fact, we're facing our second winter with this surface and have not had to add any gravel, even after repeated snow plowing. The surface always looks great and, with a little raking, makes an attractive social space. We followed CORE's surface prep instructions and have had no performance or aesthetic issues.