I'd be interested in your experience with this lens, BTW.
Alan, so, did you buy it? How does it work?
Even though it's a bit late to affect my purchase decisions (I bought "native" Zeiss 16-70/4 recently), I'm still interested in your experience.
Judging by reviews floating around the internet, the biggest risk is to get a copy with decentering issues... I always take such reports with a huge grain of salt, but with 16-70/4 at least 50% of review sites that bothered to test this lens reported decentering. Oh well. To the extent that I can see (and care...), my copy is perfectly fine, although I do not shoot brick walls, and was only checking regular shots.
What about yours? Not that curiosity is killing me,
but would appreciate your opinion.