I have installed the grid and I am delighted with it. This sloping gravelled drive has been a problem since 1904 when the house was completed. It had a hump, where people had raked back the gravel from the gates over the years and consequently, a fearsome gradient beyond which cars slid down in the snow. I have lived here for over 30 years and had given up on the drive. You will see from one of the photographs that it had come to resemble a farm track. I have done a lot of DIY work over the years but even so, this project was not only really easy, but quite enjoyable. I re-levelled the drive so that the steepest gradient is 1 in 8 (12%). I spread out a couple of 800kg bags of coarse grit and used a hired wacker plate compactor. Assembly of the grids was really easy. The gravel has not moved at all. It is lovely to walk on, a pleasant but firm crunch, quite unlike the sensation of ploughing through ordinary loose gravel. There have been a few blades of grass that have risen from through the gravel but they can be pulled out, roots and all with a finger and thumb. My neighbour across the road said that I must have put £30,000 on the value of the house. I do not care about that; I just keep looking at the drive and taking delight in the transformation. Of all the DIY jobs that I have done this has been the most satisfying. Nidagravel is superb. Thank you.