"Understable discs are exactly what you need as a beginner. These discs are designed to not need as much speed behind them and turn over much more to the right when first thrown. As long as the disc is understable, has high glide, has low speed, and has low fade, it’s good for a beginner. Also, if you’re new to the game, understable discs are easier to control. This will allow you to be more accurate and get maximum distance from your shots early on.
Intermediate to advanced players can also use these understable discs in a variety of ways including specialty shots (like rollers)."