Lance Ulanoff, Mashable:

Apple explained that, yes, there were some interesting acoustics in the space, one that, incredibly, doesn’t have a single column to hold up the ceiling or to slice up the sound, but I might have noticed that there were no echoes during the iPhone X launch event. People, they said, act as a natural sound absorber. If there were a small gathering, though, Apple might choose to put a bit of temporary acoustic absorption up on the walls.

And:

What you see when you look at the Steve Jobs Theater from the outside is simplicity in the extreme. Inside, there’s no visible frame, pipes, wires, or speakers to break the illusion. The secret, though, is that it’s all there.

The carbon fiber roof is supported by the glass frame. Foster + Partner also hid the wires and pipes in plain sight. Twenty of the thin joints separating each glass panel house specially-designed water pipes for the sprinkler system, itself hidden under dozens of recessed circles in the carbon fiber roof. The remaining joints are home to wiring for power, data, and audio.

This is just a taste. Great read. Take a look at the video embedded below. The elevator turns as it goes up and down. A magical space.