works as it should. I divided 1200 sqm. Foot tiles, and there were many places where the thin paste stuck to the slab. As with any tool, if you use it properly and learn how to use it, it will make your job easier. This thin film remover will remove the thin film more effectively if you take it at the right angle. I would suggest an angle of around 45 degrees and take your time. I used a Bosch hammer drill and the machine did the job. I am right-handed and rest my elbow on my knee when I brush. It takes a lot of stains from the back.