I was at the employee previews today and all I have to say is that this thing seriously kicks booty. After my 4th ride I have come really close to deciding that this is my new #1 all-time favorite. Yes, the audio is just a tad too load especially in the preshows (and yes the employees also sorta laughed during the preshow but hey, the park is really trying to improve things for the GP). Neal was also there and he was going though with several others looking over other certain things to the pre-show and will most likely be making some adjustments over the next few weeks. Also the fire effect sorta startled me, mainly for the reason that on the first 2 rides.
Also expect Very Long lines for the ride this weekend, if you are looking at getting on it soon I'd suggest going during the week when it is slower due to the shorter hours. Plus, The Flash Pass isn't going to be available for the ride.
But in conclusion Go Ride This Ride!!