My only complaint is that the backlight behavior has like a dozen different settings, none of which are "off". There's "on", "flicker", "blink when you hit the key", "ripple out when you hit the key", "move in waves regardless of input", etc., but there's no "don't be light" option.
I got a c3 pro a few weeks ago and you definitely can turn the lighting off. Don't remember whether it was through cycling or some other combo but you can. Did you look at the manual?
