What Prodigy has to say about the D2:

The Prodigy Disc D2 is a very fast, over stable driver that is designed for strong throwers. Just slightly less stable than the D1, this driver is good in all conditions and flies just as well into the wind as it does with the wind. It is an extremely reliable driver with the least amount of side-to-side movement of any driver on the market. It is equally as long, twice as forgiving and has a much gentler finish.