Slightly incorrect! The offices there vary in size from one person to up to a dozen. A lot of offices in various sections of the ring accommodate 2 persons.

Yes there is a big glass/sliding door but from what I have seen when closing the door it is quite soundproof (unlike some small conference room). And they provide inside each section different zone with huge whiteboard and sofa/chairs to help facilitate brainstorming/discussion, even each area has its own Apple TV to project on a huge screen through AirPlay.

So overall it is quite good from what I was able to see for the few hours I was there. Folks working there like it.