From Citywest you drive up to Tallaght and around and then down to Blessington as far as I know. It could well vary though.
The "test" itself is handy enough if you are a capable driver with good experience. They are looking out for not just your driving skills but your anticipation, awarness and so on.
You are tested on two drives, 1st drive is an assesment on how you drive, then following that the instructor drives and shows where you should improve and then you drive again. You are marked on any improvments you have made aswell. They like to see that you have learned something from it.
In between all that there are class room style talks on driving techniques and safety on the road.
Food was provided the day I went.