The Wizarding World has such a great atmosphere at night. You totally get the feeling that you're strolling through a little town that's 'going to sleep'. And best of all, Hogwarts is just beautifully lit.
I think that it was amazing how Universal was able to bring in Alan Gilmore to help design this area. Alan played an integral part in bringing the Harry Potter world to life on the big screen. His influence can definitely be seen in all of great detail of this attraction.
And oh yeah, the Butterbeer is quite good..... especially the frozen version. :)