I rode Kong 3 times during my trip. First one we didn't go outside to begin which was unfortunate. Second time was fantastic, went outside, everything worked, sat outside row of the truck.
3rd time...brought my dad and brother, their first and only time....during the "Trex on both sides" scene, the truck did not move at all once parked. The 3D worked okay, and they didn't even know what they were missing, but I was disappointed they didn't experience it at full go.
All in all, kong and Gringotts were fun, the line and theming are great. BUT both fell short of my expectations. To be honest, and it's a dead horse I know, but the screens are old to me. I just don't enjoy it as much.
Mummy was still my favorite ride. I can ride that baby over and over, it's fantastic!