[oakesm9]

The colour screen have a much slower refresh than the others. The greyscale one I have takes less than a second with minimal flashing.

[vanderZwan]

Yeah, a black and white version would probably have been fine. Somewhat frustratingly they don't seem to have a 7 inch greyscale one though, only colour versions! Maybe they used to but stopped selling them?

EDIT: posted this before I noticed harpastrum's comment