Apple being quite detail oriented probably has this feature working well.
A minor concern, that's only minor because I'm not buying, is how buggy the software is.
Initially I had zero interest but as release approaches if I hadn't lost trust in Apple I'd buy a SS model just for fun. Everything Apple I have, which is a lot, is truly excellent. BUT...my iPhone 6's!
So I'll continue to enjoy the discussions but wait. Money isn't the issue, the frustration of having an excessively buggy product from a company that I KNOW can do better simply isn't worth it.
I'd even say that if more people would use a wait and see approach Apple would _return_ to delivering the quality they used to. Note: I'm not expecting bug free software, all software no matter the platform is bound to have minor bugs. It's the big crashes, hanging or spinning indicators that should be sorted out.