If I was in the area it'd be cool to drop buy and buy shit tons of that candy butt otherwise... I'm not big on theme parks and the places I would've most liked to see there weren't recreated so. -shrug-
Yes, I've gone - during an HP convention, no less. We got to go in at night without any of the lines and it was just awesome. The detail that went into it is fabulous, and it's a great place. It's at Universal's Islands of Adventure. It costs a bit of money to get in and all that, but I think it's worth it.