Very pretty mountain that's big enough but is still without the tiresome resort atmosphere. The hills are great and there's some sick tree runs. Like people said, the view of the St. Laurence is AMAZING. Sometimes you'll be skiing up to a pitch and feel like you're about to drop off into the river.
Not sure if it's worth a 10 hour drive just for the skiing, that really depends you. But you could always make it a road trip and hit up Quebec City and Montreal on your way home.
Like people said it can get deathly cold in that part of the province during January especially. Massif gets dumped on from time to time, I know they used to go just on natural snow. So make sure to check the weather and conditions before you go, hitting it when there's fresh pow and it's not too cold would be dope.