I definately thought it was worth it. I don't know if it's just me, but it seems like some parts were changed a little. But that could just be because she was doing it live. Was there an audience in front of her, or was it just a recording studio with lots of people in the back?
I guess the time depends on how fast and slow your computer and internet is. I don't know how long it took for it to download on my computer, but I just went to a friends house for like three hours came back and it was done. Then you can be doing something and not yelling at your computer for being so slow.