I just hope they are reliable!
Intamin? New technology? No chance!
Just thinking, should the intamin 4D (or Ball Coaster if you're being pedantic) be classed as a 4D at all since it has no lateral movement or banking at all leaving it with just two dimensions of movement (vertical movement and free spinning cars). It is essentailly a flat spinning coaster flipped on it's side.
Anyway, I'm probably drifting off topic here.
I had no idea that Efteling was getting on of these or any park in Hungary. Looks like this could become the next big clone along with the SLC and the Boomerang