Great laptop, very powerful, Windows (Meh!) works well, Linux compatibility needs some work as it one of only a handful of Thinkpads that do not have great Linux support at this time

As of 6th February 2021 there its best to choose a recent Linux with a Kernel version of 5.8 and later, I tried a few but chose Kubuntu 20.10 as it seems to offer an easy route to a usable Desktop

Fn keys don't work on initial boot - there is a work around after booting put it to sleep at SDDM and the wake it up Fn Keys then work

Ocasional loss of audio - go into Plasma audio settings select the advanced tab the select and reselect 'analogue stereo output'

More detail to follow