I used to have a Netgear setup with a Nighthawk router and repeaters. It took hours of tweaking until the damn thing worked properly. Even after properly setup, performance on the main bedroom was terrible (~6Mbps down, when the living room was doing 120Mbps down consistently.) Handover between APs was terrible too: going from the living room to the bedroom there was a 50/50 chance your device would get "stuck" on the wrong AP. After installing some custom firmware for the router, I managed to improve that (there's a setting for kicking devices once the signal is below a certain threshold) but that was far from trivial. Going from bedroom to living room was even worse, as the repeater was dumb and wouldn't force a disconnect even with super low-signal. I usually had to turn wi-fi off/on on the device to force a reconnect. Let alone the amount of times the repeater would just stop repeating and needed to be unplugged from the wall to come back to life.
Installing 3 Google WiFi APs took me all of ten minutes, performance is excellent across the apartment and I don't have to deal with AP handover. It just works. And it cost about the same money as the original setup cost, with 0 of the aggravation.