I am with apple that the antenna is a brilliant design. It allows bigger battery, smaller size and more sensitivity. The downside is the weak spot location. I believe apple can find a way to improve it in IP5 next year. Meanwhile, I think engineers from companies laughing at IP4's antenna are serious evaluating IP4's antenna. It is such an eye opener for them. How could someone come up idea to design antenna like this! So, don't be surprised if external antenna become next trend of smart-phone antenna design. Mark my words!