I switched from a RPI4 to this Beelink SER3 Mini PC lately available from Ali Express and preconfigured it with these tweaks.
Replaced the preinstalled Windows with the latest Debian 11 and installed HA Supervised onto it following kanga_who’s Guide.
All went flawlessly no hiccups during the whole installation process and during continuous use ever since. It just works. The system is very snappy, no waiting times and plenty of ressources left for future-proofness.
For users with some basic Linux knowledge definitely a recommendable device and much cheaper than a NUC with similar specs.
Since the Mini PC is compatible with the latest Debian 11(out-of-the-box support for all hardware components) I believe installing Home Assistant OS instead of HA Supervised should not pose problems.