The purchase of RBK753 is a replacement of our old RBK20. I was shocked by significant improvement over the old device in terms of speed and coverage, which is something I did not anticipate. As rough estimate, the speed improvement is at least 4X faster than RBK20 with no change in fiber plan! The installation was easy, and synchronisation of satellites with the main router was so much simple, unlike previous devices where pressing of 'sync' button simultaneously at both the router and the satellite is required. I am extremely satisfied with its performance and would recommend those who need fast and seamless wi-fi network at home.