Have been to Champery over the last six years or so and have never skied such a large linked resort. You can spend most of a week there and hardly ski the same run twice. The village itself is quiet, even in high season; it feels fairly empty and you don't see many youngsters about 'till gone midnight. That said, there is plenty of places to get a few beers!
You can get two types of lift passes, Swiss side or the Porters de Soleil pass which covers the French resorts which are a little higher with the snow being better if the season is not very snowy.
All in all, if you like skiing more than nightlife this is a great place to ski, and if you get the train from Genova, like we do, it follows lake Carman then takes you up the mountains. The scenery is beautiful; no better way to start a ski break.