Which lead to the next point: Always have some spare PC points for those PointBreak stays! Seriously, these days I am always looking for PB opportunities, and would rather pay then redeem award for stays (and earn lots of points) if the price is not too expensive.
Because of this, as soon as I know HI Paris Gade De L'Est is on PointBreak I just booked it straight away, and actually booked over two different periods. You can always cancel it if you later not need it.