I bought the $99 version with five lenses and then added the polycarbonite prescriptions behind them. I like them. I have found the orange lenses are great and in summer their is a brown that works well.
I bought my son a set a few years back when he was shooting SC's. He has had two frames break in cold weather just trying to open them. Send them 5 bucks and the old frame and they will replace them. I would recommend another brand myself. I bought a set of NYX's which are a superior product as far as cheap glasses go. I have long since moved on to better glasses than either the NYX or sunbuster. They stay in the bag to loan to someone when they need a pair.