Make sure you make a reservation so you aren't wai...

Make sure you make a reservation so you aren't waiting on standby to enter. The customer service agents are helpful and friendly. If you want to see the infinity mirror exhibit, choose the earliest reservation time to get into the museum; once you get in you must sign up to get into a queue to see the exhibit. Then you can leave the museum and check out the Disney music Hall or grab breakfast. You'll get a text once your turn is within 10 minutes. The rest of the museum takes about an hour to go thru.
To give an idea, I had a 10:30 reservation on a sunday, and I signed up as soon as I got into the building. I had to wait 1 hour and 30 minutes until it was my turn to go into the exhibit. Around noon, people were coming in to sign up to go into the mirror exhibit and the wait was 5 hours!!! Crazy!
Infinity mirror is pretty neat to see, you get 45 seconds inside by yourself or with another person. If you've ever been to the San Francisco pier, there's a mirror maze you can go through and it's kinda like that.