Has anyone on here run the GR20?

I fancy it so if you have I'd appreciate knowing

1- Over how many days did you do (mileage per day)
2- What kit did you take - did you sleep in refuges/tent what about food water etc - do you need to book refuges or just turn up
3- What is the nav like
4- What time of year did you do it
5- Which way

Cheers in advance