This was the only study material I used, and I just made SSgt first time with 20 points to spare! Well worth the money, if you use it properly. (PDG Suite NCO)

This PDG program is great! The games really do help you remember, as well as get your competitive side going! Awesome!

Absolutely nothing better to help you prepare and get promoted! Just selected for E8! (PDG GOLD for SNCOs)