Our tech did an amazing job. He was very polite and explained the process to us. He even brought his own shoe covers! He also covered all the areas of the house with floor and wall corner protectors. He did an amazing job and we did not see a speck of dust or any damage to the walls or floors after he was done! (Our home is new construction so these things were extremely important to us!) He was great!! It was amazing to see the dust and pieces of construction material that was in our ducts! I highly recommend duct works.