I went to the Wizarding World of Harry Potter on June 15th 2010 before it was officially open, We got in with no wait and the only thing we couldn't do was forbidden journey. I Went and saw the queue on opening day (then went to universal) and Went back on the Sunday to ride forbidden journey and had to wait 3 hours to get in to the area.
I thought id post my favourite pictures for you.
This first one is me outside On Opening day.