+1 for Dream Machine Pro. Own one at home and have stretched them pretty far in SMB environments.

I use it with 8 APs in a mesh and a few switches, all UI, and it just works. I also have a lot of success helping out some local SMBs by setting up UI for them.

IPv6 support is basic at best. The zone-based firewall is very prescriptive and limited. ACL stuff is not great. To increase the MTU of the physical interface connected to the ISP I would need to hack a systemd unit that did it on boot (I either need it at 1508 so the PPPoE interface uses 1500, or I need to MSS clamp it and have it effectively reduced to 1492). Initial configuration requires the device to be connected to the Internet.

There were a few other niggles, and in the end I just found it easier to do what I need on OpenWRT.

I really like the DM Pro and have it deployed to an office of about 50 people. It's a pretty no-fuss solution and fairly simple to manage.

For my personal setup, I decided to go with OPNSense and I couldn't be happier. Much more control, at the cost of being a little more hands on.

I think the best (rough) comparison here is MacOS vs Linux (or more accurately in this case, FreeBSD).

I started with Unifi and it's been pretty great overall. I've integrated all the cameras into Home Assistant, it's all local, and can bridge with HomeBridge so it all shows up and plays nicely with HomeKit as well. Rock solid and very few complaints.

I've had standalone routers, Eero Pro, Google Wifi, TP Link Deco, TP Link Omada, and probably some I'm forgetting. They all had something that just enraged me.

I finally bought a Unifi and I'm very happy with it so far, 6 months in. There's a few things I haven't tried, like rebooting it while it doesn't have an internet connection (I'm looking at you, Deco!), but so far my big complaints are that it's opinionated about the initial setup, and setting up a static IP for a device that isn't connected yet is a serious PITA. I had devices on my old system that I didn't want to have to change IPs (because the computers talk to each other) and that was not easy. If I had to do it again, I'd probably just let it do what it wants and deal with changing all those configs to the new IPs.

FWIW, I just have it as a router, and my Wifi is still some of my expensive standalone Asus wifi routers acting as just access points. I didn't see a point in replacing them when they were working great as APs.

See the answer I gave to the sibling comment.