I've had my M1 mini (16/512 GB) since around 20 November and I've not had a single negative issue with it.
Runs silent and cool, and the most important thing it is fast and the user experience, that is hard to explain, is just outstanding. It is just so responsive when using it everything just feels crisp (or snappy). Zooming in pictures documents, switching virtual workspaces, switching between open apps everything is just "crisp". This is an aspect no benchmarks can ever show you.
I mainly use excel (word, mail, teams etc) and AutoCAD (through rosetta) on the computer. So not the heaviest user but everything just works so well.
Main complaint is not with the M1 but with some software, so it's not the M1s fault. OneDrive really is **** (and it was **** on intel macs to and it is **** on windows), Teams eats RAM but at least it doesn't make the computer try to light itself on fire (like on my work issued windows laptop), again Teams is a software issue not an M1 issue.
Writing this CPU temp currently sits at 26°C