Have you ever seen Nadal play? Or are you trolling now?
Let me put this into perspective for you. Another guy who posts on here plays on my school's club team. Since I string for him, he offered me 3 or 4 sets of 4G for free since he hated it. I turned them down just as fast. Now, I am not saying the string is awful. I'm not saying that at all. It doesn't do anything spectacular that any other string does. Scorpion has more control, Iontec has more feel, many MANY have more power, even more have more spin and everything from WC and Signum Pro has better tension stability. Within Lux, ALU is a far superior string and I am not even a fan of it. I can easily recognize, however, why people like ALU. It feels like nothing else. 4G just feels fairly generic.