Comment by jacquesm

Yes, you can use the P1S offline, but they've done everything possible to make it hard: crappy micro sd interface without the ability to use folders, USB plug absolutely inaccessible (see if you can even find it) and then, once you've found it it turns out that there is absolutely no way to use it to print with. They push you towards their closed source plugin 'for your benefit'. Fuck that stuff. There is absolutely no way I'm going to run a Chinese built piece of software that I can not inspect on my desktop. FOSS or bust.