They've mostly been solid, and aren't too expensive. I did replace the one in the hall (on the ceiling) outside my living room recently though, upgrading it from an AP-AC-Pro to an U6-Pro and the range is significantly worse on the same WiFi spec, making the living room TV basically unusable for streaming, despite being flawless on the older AP.
I'm going to try the newer U7 Pros and if that doesn't work out, I'll start looking at alternatives, but I suspect anything acceptable will be more expensive. I run ethernet almost everywhere so WiFi is just for our mobiles/laptops/tablets/IoT, but the TV in the living room currently has no easy way to get cables to so that AP is critical.
I'm coming to the realization that mixed 2.4 ghz/5ghz access points aren't a great idea. If I wanted consistent 5 ghz coverage, I'd need a lot more access points, but I'd want to turn the 2.4ghz radios off on most of them because 2.4ghz goes too far.
The hardware is relatively inexpensive and seems to be rather stable, the company is based in Latvia, and the manufacturing (or at least the board-stuffing and injection-molding) seems to primarily be done in Europe. Some of their stuff is pretty flexible about what kinds of PoE is can work with.
All of the Mikrotik stuff I'm aware of runs their Linux-based RouterOS. This means they all get the same user interface -- the same for a "switch," for an "access point," and for a "router."
I like that this blurs the lines between different device classes. For instance, my access points have two Ethernet ports on them, and two radios. I can use them as simple access points, or as routers, or as switches... or all of this at the same time. Whatever I want to do with them is fine: It's just a highly-configurable device with n hardware interfaces available on it.
I could replace the separate switch and OpenWRT router that I have on a shelf in the basement with a singular Mikrotik switch that did both jobs if I wanted to. (I probably would not, and it probably would never make sense to do so, but their software allows me to do as many nonsensical things as I choose. That's a good thing.)
For me, wanting as much open source in the stack as possible, it gives me peace of mind, but it really depends on the individual.
All I can really suggest, is to take a look at the Coreboot site[0] and see if it sounds like something you'd want.
It's still Chinese hardware, but it's warrantied by Protectcli and you have control over the bits you can change.
My first move out of the consumer "junk" was Ubiquiti EdgeRouters but their software quality declined a few years back, and my models got no more updates, then my main router died. My overkill i3 6-port Protectcli box has been running great ever since; first with pfSense now OPNSense; I'll only replace it when it dies or I want 10GbE routing.