Well all things considered the MNT Reform has bad performance for the price (same price as a laptop with a Snapdragon X Elite while being 3x slower than my current 5 years old laptop), bad battery life for the price (even if the batteries have better charging cycle longevity), and no meaningful support for any OS other than Debian (or a special version thereof?).
Also the default keyboard layout is IMO cursed, and adjusting it requires building and flashing a custom version of the KBC firmware, but realistically this isn't a big deal unless the physical key layout is unworkable.
It has undeniably lovely industrial design overall though and everything being OSHW is really fucking cool. And the handbook is neat.