I’ve had decent performance with both Asus AiMesh (it’s much, much better since they upgraded it to version 2.0), and with UniFi - again it’s been excellently stable compared to the older UniFi stuff that’s installed at work.
The AiMesh system has 3x RT-AX56U routers, which gives excellent WiFi6 on both 2.4GHz and 5GHz.
The UniFi I’m using a mix of U6-Lite, UAP-AC-M and UAP-AC-Lite. The AC-M cover the front and back yards, the AC-Lite is in the garage (which has a heap of Shelly power monitors and other IoT devices), and the U6-Lites cover inside the home. The only caveat is the U6-Lites only do WiFi6 on 5GHz, 2.4GHz is WiFi5. Not an issue, as any 2.4GHz devices are MeRoss smart switches and the likes, so no big panic there.