They deserve 10 stars. Awesome company. Highly recommend them!! Lots of remodeling in home and that created lots of dust and dirt circulating throughout our home. If you went barefoot, even after sweeping, they would be dirty. Our vents were black. Safety King did a fantastic job cleaning our ducts and vents. Vents are no longer black. Feet are clean when walking barefoot in home. So glad we found them!!! We also had Safety King Aeroseal the duct work. Wow!! Now our furnace and /or AC run more efficiently and less often, Which translates to lower utility bills and $$ saved. I highly recommend them.