I've been on the new campus several times.
The "spaceship" is an amazing building, but mainly for marketing and sales employees. The engineers that design the actual chips and other hardware internals didn't want to be in the main building and are in other locations both on and off the Apple Park campus.
The cafeteria is awesome, both the food and the seating area, but it's not free like Google and it's not super-cheap. You have to order on an iPad kiosk (perhaps employees can order remotely, not sure) and pay for food with an NFC capable device (it may only be Apple Pay, not sure if they disabled Google Pay or contactless credit cards). Regular brewed coffee and tea are free.
Only the lower level of "the Spaceship" lets you walk all the way around, the upper levels do not. If you want to go to someone's office on the same floor as yours, but on the other side of the building, you have to go down to the ground floor, walk around, then go back up to the section where their office is located, the reason they did this is to maximize usable space for offices, rather than use the space for hallways.
It's a long walk from the parking garages next to I-280 to the main building, but there are bicycles available if you get to work early enough. Some employees bring their own bicycle to ride from the garage to their office.