I have it. The lag is so bad that you have to aim 3 feet ahead of people moving to hit them. Aim directly at them and you're guaranteed a miss.
Lol, I actually have this. It was my only way to play online for some time, and considering that my 360 disc of this game is messed up, it's the only way I can play COD4 online atm. But my friend's going to let me borrow it so I can install it, and then I'll probably sell this one. But, for now, I use it to play Old School mode, since (for some reason) it was missing from Modern Warfare 2. I'm not sure what my friend code is, but I'll probably play it soon, so I'll look it up then.