I have a 500 MBit internet at my apartment but the modem and wifi transmitter that came with it was rather weak. The signals into my bedroom were at time and the repeater I had on one of the corridors did not transmit well, and the speed was much slower than I hoped.
I had been reading about making myself a mesh network at home but most of the setup were tricky. Then I came across the Orbi system. It came in two units - the main transmitter and the satellite which I placed in my bedroom.
It was not perfect but I was able to get consistent speed in access of 200 MBit in my room which was great. There were also less interference when I got my TV, PS4, hifi and the rest connected to the network. Setting up was also straight forward enough mostly through a web browser. Since I started using it, it had yet to crash.
Unfortunately the system was not exactly cheap. In the end, for the speed I was managing to get it was certainly worth it ...