I read other reviews stating how big this museum is - I confirm it certainly is! Loads to see, so leave enough time. Recommend booking tickets ahead in advance to avoid the long queue to get a ticket. You simply then show your QR code on your phone / print out to access all areas. On arrival, get a map from the information desk when you enter. The greyed out parts on the map indicate rooms which you cannot enter due to long-term refurbishment. This caused us a bit of trouble navigating different routes, but there are plenty of staff around to point you in the right direction.
You can purchase an audio guide (around $8), but you need your own headphones. We opted not to, but there were plenty of info boards around, telling you about various collections.
The Egyptian Art section was fascinating.
There are several eateries throughout the museum. Would recommend 'The Eatery' on the ground floor. Choice of burgers, soups, pizza (inc. GF base), sushi, sandwiches. There is also a dedicated cake section, including a section for GF cakes - the muffins were really nice, I noticed were from a local GF bakery, 'By the Way Bakery'. Later on we wanted a coffee; we were going to head for the American Wing Cafe on Floor 1, but saw the queue so went back to the Eatery which was less busy.
Gift shop is very expensive, but cool to look around.
A good half day spent, although you could easily spend the whole day looking around.