Very good with openwrt
I chose this model referenced on openwrt.org, in the "I want to buy a router that is supported by OpenWrt" section. However, there is no release for the moment (March 2021), but the snaphots are installed without any problem.
Once openwrt is installed and configured, the MR8300 does the job well and is easy to forget, especially as the local adoption of IPv6 makes communications much smoother.