Just bought a used, but very well calibrated MK3S last month as my first foray into 3D printing. I love this thing so far.

And it doesn’t know my wifi network or password. I save files to an SD card, plug that into the printer, and print. No apps, no printer connecting to the internet to verify registration, no sending my files somewhere outside the home when printing.

Might run it through a MK3.5 hardware upgrade in not too long, which is another cool thing they do: give you an upgrade path for older models (like mine) to use newer equipment from newer models.