Good job you get the "2D" version as well as the 3D as the 3D is VERY poor. Continual ghosting, especially on close up faces, the (included) red & blue glasses cause whites to almost flash with interfereing colours and some parts of the film simply can't be made out at all.
On the positive side, some of the 3D work is beautiful, it seems particular care was put into some 3D scenes? Snowflakes do look like they are 2' into your living room, some perspective scenes are superb, but your eyes will hurt by the end of the film.
I'm happy with the purchase, I've got Polar Express 2D on bluray and on DVD in this set, together with a good list of extras and bonuses. The 3D was great to experience (to see the good, high quality snippets) but I doubt I'll be watching that again.
In essence, I'd have definitely paid this price for the 'standard' bluray alone, so no grumbles that the 3D one isn't great.