Been to SS, SP & BW and prefer BW over all of those. Yes, you can get the big white out from time to time, but you also get the dry okanagan pow which BW is famous for.
Lots of good gladed skiing and they opened up the Cliff chair last season which gets you some good expert terrrain. Don't go by the trail map. All the good skiing is off the trails. We spend 90% of our time off the main trails. Its got a lot more variety than SS or SP by a long shot.
We go there every year.