The Roadrunner is an awesome disc in different ways for different throwers. New players will do better with a Roadrunner than something like a Boss or a Force. This disc is "understable" which means it's ideal for new players, tailwind shots,,turnover shots, or roller shots. Lots of glide and just enough gas pedal to get you where you need to go.
The GStar plastic is a great new development in the Innova arsenal. Just as sturdy as Star but with a more grippy, gummy feel.