Cooler Master claims this keyboard has full n-key rollover and anti-ghosting features. For a reason about why ghosting even exists, read here. You can do a ghosting test from your own keyboard by holding down both Shift keys and typing a sentence with all the letters (or just type the alphabet). If your keyboard has full anti-ghosting then all of they keys will register.
Ghosting test
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG All of the keys would register while holding down both Shift keys, so the ghosting test of the CM Stealth passes.
Cooler Master manages only 6 key rollover
Doing a rollover test, I could hold down 6 keys and as soon as I pressed the 7th, one would pop off. Granted when typing you probably won’t use more than 6 keys at a time, but in gaming you could be moving diagonally forward while running, crouching, and reloading and then jump. When in PS/2 mode, you can press as many keys as you want. USB technically has a 6-key rollover, but it strikes me odd that the Corsair K95 keyboard has no problem holding down 20 keys at any one time. 
Corsair’s K70 manages a whopping 21 key rollover
The keyboard throws me off when trying to use the arrow keys. I usually gauge the position by the bottom left of the keyboard, and this keyboard throws me off. When I try to orient the arrow keys my hands find themselves above the right Shift key.
n-key roller
Writing on this keyboard is different than using Cherry red switches. The red switches seem more fluid, and I actually like the feedback of the brown switches.
