We did it in October - very nice pictures. It was in Innoventions, the one to the right if you're entering the park. Ask one of the CMs when you enter the building, they'll point you to the area, but it's in the back corner. We just got in line, they checked to see our Disney Visa (you do have to have it with you), then when it was our turn, we went behind the curtain. They took about 10-12 pictures of our family, the kids played around with the characters, and then when we were leaving the park, we stopped by the Camera Shop (right by Spaceship Earth), gave them our voucher (they'll give you one when you get the pictures done), picked out the picture that I wanted, and that was it. Very easy!