Glad I purchased the deal!
The only thing that would've made this deal better was if I could've purchased more than one for my house. Great workmanship. It was quite fascinating watching the teamwork between the workers that took care of my vents. They were courteous of my allergies and advised me that the solution they sprayed into the vents would initially be strong. I did start sneezing,but am glad it will be helpful. The inside of my vents were very caked with dust and dirt and other gook. It is all out never. I saw piles and layers when my vents were opened up and it all disappeared. I am a happy customer