I just got back from a 4 day family trip. I'll agree with most of the comments here except we had only minor waits in the lift lines being post-xmas. However, some of the popular runs were still crowded and got a little scarey due to the number of very fast skiers and boarders at this mountain.
The North side was definitely more carver friendly and the length of runs was perfect for me. On the South face, La Crete was truly awesome. Also enjoyed Beaupre and La Montmorency.
Grooming was sketchy at best. I think mainly because of the night skiing. Also, it seemed that some runs had these small bumps spaced 10-15 feet apart giving it a washboard effect. It got hairly when you hit those at high speed.
The black diamonds, for the most part, were not rideable in carving gear due to the moguls and lack or space - very narrow.
La Massif was an awesome experience. Loved the big, new chalets and the scenery. Again, not overly carver friendly but some nice runs could be found - La Petite Riviere, La Richard, L'Anguille. I tried to talk my way onto La Charlevoix where the Canadian Downhill team trains but was unsuccessful. Good thing when I found out later that part of it has a 65 degree pitch.
We stayed at Chateau Mont Ste. Anne and I highly recommend it for a family holiday. Food on the meal plan was fantastic (typical meal: Crayfish bisque, escargot, deer medallions, creme brulee).
My next trip is to Marble Mountain, Newfoundland in 3 weeks. Right now they have 10 cm base with ZERO runs open. Someone in Newfoundland has made Ullr angry. Time to sacrifice some cod.