I've seen Alice in Wonderland and Tron in 3D. I thought they had been better off without 3d. It doesn't work so well to me so if can avoid the 3D versions in the future, I will.
"So 3D films require us to focus at one distance and converge at another. And 600 million years of evolution has never presented this problem before." -Walter Murc in article:
Why 3D doesn't work and never will. Case closed.