I don't know what the hell you all are griping about
but one of the best instances of the 3D depth - if you theater's brightness levels are calibrated correctly - was the instance when
[Show spoiler] Bing Bong tells them they should take the short cut to the train and the view into the dark 'Danger Do Not Enter' passage way - the foreground to the train in the background had a reverse wow factor of 'whoah that looks far, foreboding and dangerous' element to the scene