I would never ever do a mystery I am too picky and need to know more before hand so making a mystery quilt is out for me...too anal I guess...lol
Once in our guild they had this mystery quilt class and I wanted to do it then I saw what they did and this one lady did it in white and a light yellow...well they were airplanes and you could not see those yellow airplanes as they were so light you couldn't tell where the white stopped and the yellow began...so that thought has put me off.