Ive never had one (its called a superannuation fund out here) super for short.
The markets themselves take and give back with its rises and falls, its the same as playing the stock market and there's no come back if they go to the wall they take you with them. Not the Market going to the wall so much but the Super company its self,if they cant make their wages they do so until they are broke, then they fold and take their cut first and then you get to split the rest which is a small percentage of what you have put in,(if you are lucky).

If I had spare cash ,I'd sooner buy into real estate and rent it out. A concrete factory is the way to go out here (they cant wreck that and they have to take out huge leases on them sometimes 15 years in sort after areas.

Land may go up and down but if you dont shit yourself and sell it on the down then you havent lost anything.

Same if you play the markets alone if you dont panic sell then you still got that amount of shares,unless your company folds and goes broke (which they love doing).Often they have mother companies that take over but still the punter pays for losses and the assholes can hide legally from you.