Ok I've done some more testing, as I did not like the end result for the screen.

I removed the screen protector after maybe 3 hours of applying it. After that, putting it back was the same job as before but I had to clean the dust on the sticky part of the screen protector and also reclean the screen, because my table got all the more dusty in 3 hours.

Because my room is very dusty, the end result was with a few specks of dust, but the protector fit perfectly, and this time the feeling when sliding a finger etc. is much more smooth.

So lesson in short: this stuff is really re-usable, but next time I'm installing in a dust-free environment like bathroom after a long shower :P If you're a prefectionist you will also probably go mad when installing