There's always more to learn
I'd done the Foundation course the day before, so was curious as to what the Progression would teach us.
Our snow & environment awareness got cranked up yet another level... Analysis of terrain, planning your routes, looking at slopes which had already avalanched and working out why... plus of course some excellent skiing to get to interesting places.
This is an excellent complement to the Foundation course. I would also consider doing this as a refresher course next year.