As for the OSD, Cooler Master has split its setting menu into six main tabs, as follows:
I don't have any real complaints with the OSD. It's nice and quick to navigate with the joystick, things are sensibly laid out and it includes all the key features I would like to see. My only piece of feedback is that it would be good to be able to change the OSD shortcuts which isn't currently possible, but otherwise the OSD won't cause frustration with the GP2711.