I was pleasantly surprised! Some of the previous reviews made me a bit hesitant, but after installing my cover I could see that they might have come from some who are less experienced with pools. I had to install the new anchors because my existing ones didn't line up. I would suggest using water to cool your drill bit after each anchor hole because your bit can get hot and not drill as well. I also used a smaller bit to drill a pilot hole to keep the larger bit from heating up as fast and from going off course. You will need a hammer drill, 3/4 inch & 3/8 inch concrete drill bit, and a hammer. I'm very pleased with the whole experience. Thank you