Well it's been a busy four days but I think we now have a clearer picture of where we stand heading into the new season.
Mercedes look far and away the team to beat, with Williams and Ferrari looking the pick of the chasing pack. Special mention too for the Sauber and Force India cars, which look both reliable and quick.
Work clearly remains to be done at McLaren, but they are not the kind of team to stay down for too long.
First practice in Melbourne on 13 March is where the new season begins in earnest.
Do please join us.