Advanced Reservations are definately required. We had first appointment at 9am in the morning and the place was packed, each chair was filled.
This is not a cut and style but just a quick style and the whole appointment (hair and makeup) was about 25 minutes. We did not do the nails, but it was nail polish for the little girls.
Afterwards we walked over to guest relations area and did the photo shoot. You can put this all on your photopass card for later purchase. They turned out great.