I like everything about this economy console except for one minor thing. The pink noise function. What I found is when you use the built-in pink noise generator in this console with a sizable sound system with some decent volume, is feedback. Feedback through the consoles frame/housing. I beleive all the latest generation GL consoles have this problem. Go ahead and try it! Turn on the pink noise, turn up the sound over your system. While its up try tapping the console surface like knocking on a door and you will hear it over your PA. I addressed this with A & H two years ago and they replied that it was not an important enough problem to make a fix.
Although you should not use this consoles pink noise source as a way of measuring a room, it better serves its purpose for referencing gain where you need to see it on the console or as a simple means of trouble shooting.