Coming to this thread; I loved this experience when I was in Universal last week.
It felt like what would happen if they did Simpsons in a full 180' degree setting, and it was beautiful. I loved the set dressing, as the new aesthetic changes to blend it with Universal Plaza is nothing short of amazing. And the Preshow's pretty fun and cool to look at; but my props for that go to the sound department on how they handled where you hear certain characters (Shrek, Donkey, and Marty sounded muffled where I was, more-so due to how I was closer to the practical elements).
And as far as the in-theater experience goes, it feels incredibly smooth, as the projectors handle the quality of the animation really nicely. Happy I got to experience it finally, as it was definitely a highlight of the trip.