Upload & Sell: On
Ian, a frequent problem with 28-80L/28-70L/24-70L zoom family has been a copy-to-copy variability of IQ. With the 28-80L the problem is compounded by the lens age.
All around, I hope 24-70L MkII is a significantly better designed lens and also fabricated more consistently.
However, I do have some reservations about its build quality, i.e., it smacks of 100L, the omission of IS is inexcuseable, and the current pricing is aimed at taking advantage of all keeners who must have the lens immediately upon its release. Once the backlog of those has been cleared up, the lens price will have to be dropped quite a bit, if Canon would be interested in having any sustained sales volume at all.