The algorithm uses eleven hashing functions from the Blake algorithm to the Keccak algorithm making it very secure which really is needed for coins that do so well for CPUs
The X11 Algorithm gives amazingly fast hashes for both GPUs and CPUs. It also keeps GPUs over 30% cooler making your expensive graphic cards less prone to overheating. The reason? Graphic cards dont require as much processing power in order to mine the coins with this algorithm