Folks when I lived in Miami I use to go to most all of the shuttle launches. Most of the time I would drive up there wait all the time & drive back. Very long day but I can tell you more than worth it. I've seen at least 3 night launches. Nasa says when srb's ignite the light is equal to 3 suns. I can't start to describe it. It is the greatest & fastest air show there is. I only wish there was some way to work it out.
As some one else pointed out they do have a tendency to cxl. I've been at least twice to where the srb's started at the t-7sec & then had a cut off & launch scrubbed. Now folks that's a real downer. Long trip back to Miami.