I've tried it. It's quite cool, but there isn't much really you can do.
You can buy owls, and clothing and stuff, but you have to pay with real money and it's quite expensive.
Ollivanders isn't opened up (it may be now I checked last night) so you can't get a wand. You'll probably have to pay for that too.
If you have a
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Even though there isn't much it's still quite a cool thing to visit.