When it comes to the layout of the Merc gaming keyboard, it's pretty decent. My only complaint is that the normal keyboard area is a bit smaller than what I'm used to, so it forces me to pull my arms and shoulders in, which hurts after a while if I'm typing for long periods... but I didn't buy it for that, I bought it for gaming.
The 10-key area is coupled with the arrow keys and the delete, home, end and so on. You simply hit the NUM lock to toggle this on and off. At the top of the keyboard, there are special sound keys that allow you to adjust the volume of your game or movies with just a couple of buttons. There are also three special keys that allow you to toggle back and forth between your favorite three gaming layouts for the keyboard – which is awesome when you get frustrated with one game and want to move on and forget to change up the keyboard layout.
But, here is the really cool part: the gaming key area. This part is broken down into a slightly slanted area with keys that are designed to fit your hand and allow you maximum usage in a small area. There are the QWEASD keys here in the center for your movements, keys for your favorite items hotbar labeled 1-11, and other special keys for running and walking, maps, crouching, jumping, shooting, and so on.
I tried out the layout on both Warhammer Online: Age of Reckoning and World of Warcraft and both worked great. I admit, I'm hooked. I won't be looking for another gaming keyboard for a while, as this one offers everything I needed.