I love the flavors of this yeast, and use it for my Dubbels, Triples, and Quads. It is quite true to the classic Belgian flavors.
One tip I got from the good people at NB...when using this yeast with the quad, add a few grains of a dried high alcohol tolerance yeast (like Champaign yeast) when bottling. The long time in the secondary with the high alcohol content seems to render the yeast "spent". The few grains are enough to get the bottle carbonation you need.
Cheers!