The place is packed with tourists all day long, specially Harry Potter fans waiting to see the staircase that is somehow similar to Dumbledore's office or the magical stairs at Hogwarts. You need to pay $3 to enter, and the ticket can be discounted from any book you end up buying. I'm not sure it is worth it... But if you go, try to be there one hour before closure. At least you don't have such a huge entry line at that time! #potterhead #harrypotter