Another important question for you guys
The AF problem is crucial(I believe), so is it really so predictable? They say 10-20% of pictures are rubbish and only the rest is dead on.
I think I don't wan't a $1000 lens that has such a problem.
I shoot with 6d and I wish to hear some feedback from people like me.
My 35mm Art is amazingly reliable both on my 5D MkII and MkIII, no MFA required and spot-on AF.
The big problem is that you can just as easily have one that is completely useless. Only way to make sure you get a good one is to buy where you can easily return/exchange it.
That is always a sensible thing to do especially for more expensive equipment.