This was something we have never had done before. We are so happy with the results. I was so impressed with our service Tech Lucas. This was the most friendly, informative and efficient Tech we have ever met! He loved his job and it totally showed! The pictures say it all. You never know how much dust and grime is hiding in those vents. We have told all of our friends and neighbors. When it comes time to have this service again, this will be the company we will be using! Very impressed with the whole experience!