I've just set up my first OPNsense box (using one of the 4-port 2.5 gig AliExpress tiny PCs recommended by ServeTheHome) and like it a lot.
A few rough edges in the UI, but I got the basic routing functionality running within minutes, and got Wireguard going with the help of a guide from Home Network Guy pretty soon after.
Since then I've bought a second box and will be setting it up soon, too!
I personally use a router box from teklager.se and they use open source schematics and bios which are actually updated. Without having done a comparison I am assuming they are a more expensive option though. It has been small, silent and stable since I bought it pre-installed with OPNSense though, so I am happy with it.
Why would you want BIOS updates? It’s not like firmware degrades over time. Frequency of zero day RCE fixes should not be taken as indication of better security.
A few rough edges in the UI, but I got the basic routing functionality running within minutes, and got Wireguard going with the help of a guide from Home Network Guy pretty soon after.
Since then I've bought a second box and will be setting it up soon, too!