pregom

Newbie question. Are these bindings useful (necessary?) only for advanced skiers who are chasing buoys at amazingly short rope lengths, or also for people like me who are just starting to slalom with full length rope or 15 off at 30 mph and making 2-3 balls so far? I'm currently using some old plain vanilla equipment from a local ski club I joined and I'm thinking of investing in my first real set of skis and bindings. As I push myself harder, I'm scared of getting hurt and these bindings look so similar to what I would use on snow skis, even at a beginner level. What do you guys think? Saving your ankles and knees seem cheaper than the price of these bindings...