Actually I did buy one of those mirrors to teach myself Kalidescope (bought the book)...But then signed up for class easier to have someone teach me then try myself.
Anyway, she didn't have us use it...Just had us block out our pattern and divide it in our heads and pretty much guess. But you gave me a good idea of carrying it with me because after class I went right to the fabrics to scope out my next one...I found a great fabric with all diff colored peppers I thought would be great. I'm buying it next wk, I'll take the mirror. Another fabric was of all diff shape and color pasta...Can't wait