Could not be happier with the results from this product. I have told everyone that asks "Did you get a new floor put in?" about This Old Grout. It does take some elbow grease and the included knee pads were a welcome sight, but the result is priceless. Did the project over two days and the entire 600 square feet looks fantastic. On top of that the grout still looks like new after two months. It cleans easier and even after spills there is NO discoloration. We could not be happier with the result. Thank you for making such a quality product.