(you can find Mia in my blog list her blog is called Min Inspiration)
I love this square and will make something from it, don't know what yet.
One square I did with a 3.00 hook and thinner yarn.
The bigger one with a 3.50 hook.
I have added a new links list to my blog today, the link to the pattern is there under, "Granny Wheel Square by Mia.