I am pleasantly surprised by how well this product works!  I've only had it up one day, and I may update depending on the system's longevity, but so far so good!  We are fortunate enough to have a home with a Radiant Barrier and Dual Pane Windows.  Unfortunately, both of those disrupt cell service.  Just outside, 3+ bars.  Inside?  Some rooms with No Signal (kitchen, bedroom), and other's with 1 bar and spotty coverage.  Mounted antenna outside, ran cable (the only hard part), connected, powered on, and 30 seconds later 5 bars within 2 feet of indoor antenna.  Now, we have cell signal of at least 2 bars, if not more, in EVERY ROOM of our home.  Worth.  Every.  Penny.