Sure. They will 'work', but they won't be the best choice for the Sierra backcountry. Good for putzing around on the little stuff is the way I read their description.
Seems like they would be a good ski to have if you aren't into skiing but you want to ski a little. Maybe you would take them out if the conditions were such that you didn't want to take out your good skis. They definitely are a good ski to take along on your snowmobile, for when you get stuck.