I haven't had the time to dive deep enough into all of the code yet, but so far I'm very optimistic. Not perfect; some of the more interesting functionality (like site-to-site VPN) is tied to a proprietary closed SaaS with associated telemetry (and maybe even backdoors, intentional or otherwise). The Wireguard setup is for some reason (legacy?) not using the OpenWRT WG-interfaces but set up using custom init scripts. And getting anything else than OpenWRT/LEDE running on them with full hardware support will probably be a significant effort. I'm a bit wary of using the stock OS without compiling it myself because, well, you know.
Still, the sources are provided (including instructions on how to customize and compile your own OS/firmware). The locked-away functionality can be ported/unlocked if you're up for it. They fully support users hacking their devices all they want - and stuff like this[1] shows some hacker DNA. Out of the box the hotspot is by far the best I've found in the price-class.
The mudi's pretty cool; pocket wifi with swappable miniPCIe 4G/WiFi cards and a small dongle for Ethernet. So one could make it into a fully customized road-warrior bridge for any WiFi/Ethernet devices, or whatever other shenanigans you can imagine with that.
I really hope they steer course on the right track and don't fall to the same fate as Ubiquity. As mentioned I haven't battle-tested them extensively yet but so far I can warmly recommend them.