I have to say I completely disagree. This attraction cannot be done justice by watching a video. If you're watching it in Nightshot and listening to the audio, the entire effect is ruined because you can see where you're going, as well as all the ugly scaffolding and track around you. If you're watching it without the Nightshot, then my guess is you're seeing a whole lot of nothing. In either case, it's just not the same as being there and actually doing it - with the music and stars surrounding you. While I preferred the original music track (the space surfing theme was very cool), the new audio has an Incredibles feel to it that surprisingly still works. I'm always impressed at how well the music synches up to the drops, rises, and turns. I actually don't care for the ride as much when the audio malfunctions and we have to go in "silence." It just feels like such a part of Space Mountain now I don't want it any other way. Please note that this is coming from one of those So-Cal people mentioned earlier who doesn't like having the Parks seriously tampered with. When they originally did it, it was a big deal to many. Time, however, has proved that the music makes the attraction so much better. I'm not a fan of the Rockit Mountain idea, though. Heavy metal blaring for three minutes just ain't my thing. I have a similar feeling about Rock n' Rollercoaster...great coaster, terrible audio (and preshow).
P.S. To the person who thought the audio ruins it because it gives away how the car is going to turn next, I disagree as well. While it might tip you off a bit, I would argue that anyone who has been on Space Mountain more than three times can already anticipate the next turn, dip, or climb. I, for one, never need to see the track to know where I'm headed. The music just emphasizes the drama...if you're really into the moment.