I have a reader, and I don't think having one means you are unprepared.
I have a great memory, I can go through the test on paper, in the arena, or on the computer ( I have a program that I can run through tests on) , but with the stress of a show and the many worries I have about being in a show, I am not always confident I will be able to remember the test once I am in front of the judge. I am new to showing, and if having a reader to start with lessens my worries, then I'll go for it. but that doesn't mean I haven't put effort into learning the test.
" If the entire world was one big machine, I couldn't be an extra part. I had to be here for some reason." ~ Hugo Cabret