I had many wifi issues due to the layout and structure of my dwelling, and Unifi was the only setup that solved them. I started with my original Orbi (Voxel firmware) mesh setup from my previous home, but performance wasn’t where I wanted it due to the age of the devices. Then I tried the TP-Link w7200 sets from Walmart, but it didn’t meet my needs connecting a remote building on the property.
Unifi are expensive, but I have no regrets. Even added their security cameras to my network when the old system needed replaced.
Any relatively large home made out of reinforced concrete will need multiple access points with cable connections.
I use UniFi myself. My parents have a grandstream setup. They are both very good. Best bang for buck right now is probably tplink omada but those acces points are hideous.
I’m personally a fan of microtik products. It’s nice as they have a lot of built in management features. However, the downside is that there is a learning curve to their products which can feel like a vertical wall some times.
do you find you need range extenders for 5 GHz? if so, you want mesh. I live in a relatively small apartment, and I’m perfectly happy with my Belkin AC1900. it maxes out at 1.3 gbps on the 5ghz but I’m only paying for 1.2 so no need to upgrade yet