I felt like it was a waste of money with all the research I had done on it. Reading testimonies that the crews came in with a basic shop vac, cleaning only the visible parts of the vent lines, and gone in an hour. Long story short, my wife finds this company that actually provides before and after pictures of YOUR ducts with a camera they run all the way through your vents. Needless to say I didn’t have a good reason not to get them cleaned anymore, especially since I had kids. Long story short, I was shocked at all the dirt that was in them and even more so at this company work performance. I can literally eat out of my ducts now!! Highly recommend them.