I took DS 8 and 4. DS8 was scared in line but loved it when we went on. DS4, whose favorite ride is Big Thunder, was scared to death. As soon as we went into the air he started to cry. All I could do is let him bury his face in my arm. If your chid is afraid of heights I would skip this one.
The safety restraints were very good and they gave us plenty of time to get everyone situated. I stood while helping my 2 get buckled. I figured they would see me standing and would give us time. I'm not sure if they will begin to rush people as visitors get more familiar with the ride.