Edit: It's actually an f1.8 (not 1.4)
I've mainly used it for indoor family stuff. And only at Disney a little. But I'm loving it so far. And the fact that it can go wide makes it really good for those indoor family shots. I sold my Sigma 30mm to help pay for it; and don't regret it one bit. That 30mm had the infamous focusing issue; and it just got on my nerves (even after a "repair"). But the 18-35 has been pretty spot on so far.
As far as Disney is concerned; I'd like more zoom as far as being a true walk-around for me. But I like shooting more towards the wide angle anyway; so it's not much of an issue.
Here's a quick handheld from it.....