Heard about this stuff from a friend, and when it arrived couldn't wait to try it out.
Works well with permanent marker pens. I found the pen colour bled and spread out a bit on the rough side. Also worked with biro which gives very fine lines.
Result is translucent
Put my cut out pieces on piece of tin foil on a baking sheet in the oven at 170degC.
They started to curl and shrink, but the first lot didn't return to completely flat.
I turned the oven up a little and put them back on the top run for a few minutes until they lay flat.
Be careful that long thin pieces don't curl over and touch.
To find out how much the material shrinks make a "ruler" cut a strip and mark off in cms the shrink
I found 2.5cm shrank to about 1cm.
Excellent starter pack but you may get addicted.