I'm just disappointed with the overall size of it. I do absolutely love that it has a built in Lightspeed receiver and it does keep my G903 mouse charged while I'm using it. I would've given it 5 stars except for the overall size of the thing. I'm definitely happy with it but if you are thinking of one, consider how much space you have on the mouse side of your keyboard. Other than that, it works as advertised and it's RGB logo syncs with the rest of your Logitech gear if you want it to. That might not sound like much but the standard mouse pad is 10'x8' so this one is hanging off the side of my desk and is kinda jammed into place rather than sitting comfortably next to my keyboard.
