Look at the size of those chunks! Maybe some of you could lift them, but I sure couldn't. I've rented a small jackhammer to take care of just a cement walkway. It was between 6 inches or 2 feet thick (not exactly consistent). It was about the same size as what was shown there and took only half a day while wrangling kids and a husband. The rental was a lot less than this product and you'd need something anyway to carve out the holes. Neat concept though.