It's nice but I think the Zeiss will be better. The Sony 28 is sharp in the center wide open, but even stopping down its not at sharp as the 16-35 @28mm. All that said it does have some character.
Thanks Torralba! I'm really liking the lens so far. It has the best flare control of any lens I've used. It's the best landscape lens solution for the sony A series cameras right now.