Thank you for your enthusiasm I bought this router just to play with Wireguard (as a client). But I only have VDSL2 (23 Mbps down, 3 Mbps up) and it makes no practical difference, speed or latency, compared to OpenVPN, even compared to my ASUS.RT-AC68U that cannot do Wireguard but only OpenVPN. I am not smart enough to play with UNIX.
This BRUME ROUTER is expensive compared to a (older) RT-AC68U that does a lot more things, and although it is stable enough, the interface is very simple, too simple for fine monitoring and the bugs that appear here and there makes it appear like a beta version compared to ASUSWRT Merlin. That’s why I don’t intend to buy another one, even with wifi (especially limited and old wifi).
Obviously, I didn’t expect that a 5 euros adapter would work as well as a 100 euros Mikrotik waP ac. That makes my network hardware use less electricity but the waP only consumes 6 W and allows me to use both 2.4 GHz and 5 GHz band at the same time. It was a no risk test and it works well enough for the money and time invested.