Used both PDG GOLD and PDG Advisor plus listened to the PDG audiobook for 6 months. I made SSgt my first time; 26 points above the cutoff!

You've been a great help. It's good to know that great customer service still exists.

I've been using your guides and CD-ROMs for a few years now ... my scores have improved by 10-12 points since using your study guides. Maybe this next time testing for Tech will be GOLD! Thanks for your great products! (PDG GOLD)