So far, I'll say this. The installation, as well noted, couldn't be easier.
WD SN850 2TB with 3rd party MHQJRH brand heatsink added fit into the NVME space perfectly with the cover able to be added. The read speed on the drive was detected as 6542.095 MB/s. I haven't yet got to test anything proper in varying game tests or anything. I'm moving about 550GB of files from extended USB storage from a standard WD Platter My Book drive, so I won't bother noting anything speed or time related there.
When I had the system open, I took the opportunity to thoroughly clean out the fins, main fan, and vacuum out the system through the dust ports. After adding back everything and getting to this point, the system is quite whisper quiet while doing the data transfer from USB to M.2 drive.