Honestly, I don't know how permissive they're with the height, however it's causing problems with overweight people because the test seat gives them the OK but then on the train it does not allow it. In this park there is no problem in wearing flip flops and they allow you to leave them on the side of the station and ride barefoot, maybe it's an option.
Normally there are 3 trains operating but they aren't having great attendance because they haven't promoted the attraction well, so there are days when two trains are enough. Each train tries to launch it in a maximum of 60 seconds. Being a Parques Reunidos park we're very surprised by the loading and unloading capacity they're having, we have never seen such efficiency in Spain
I hope I've explained myself well, my english isn't very good. If you've any more questions I will try to answer