Quite awesome. It actually introduced me to Hitchcock. Anyway, as I recall, you first experienced a montage of clips from his films, ending with a 3D attack of The Birds. Then, there was a stage show where a faux film crew recreated the shower scene from Psycho, complete with Anthony Perkins himself on a big screen. There were also various exhibits that recreated famous scenes from his films. YouTube the Universal Studios Magic of Movies VHS to see.
Anyway, those comparison photos are pretty depressing. Notice how gaudy the new facades are and how understated and realistic the original architecture was aside from Nick. The entrance to Kongfrontation actually looked like the old Pennsylvania Station in Manhattan, Back to the Future resembled a World's Fair pavilion. Now, they just look just kinda tacky and cartoony, even the globe and entrance gates. I know a lot of people prefer Universal Studios as it exists today and it may be silly to modern audiences to see Kongfrontation or Ghostbusters when you have Harry Potter. Still, the original Universal Studios Florida was undeniably amazing for its time. The precursor to Diagon Alley or the Wizarding World at Universal was walking into Kongfrontation or the E.T. Adventure. Just magnificent.