THE FIRM IS A COMPANY WHO MAKES VIDEOS OF CARDIO AND WEIGHT TRAINING.YOU CAN GO TO THE HOME PAGE htpp://www.firmdirect.com/. A LOT OF PEOPLE IN THESE FORUMS STARTED WITH THE WEIGHT TRAINING WITH THE FIRM AS I DID. I PREFER CATHE BECAUSE HER CARDIO IS MUCH BETTER, THE STEP OF THE FIRM IS SLOW AND BORING, AND HER WEIGHT TRAINING IS MORE INTENSE TO ME.CATHE IS MORE TOUGHT AND FUN.I PREFER CATHE BUT I PRESERVE THE OLD VOLUMEN 1.IF YOU WANT TO TRY THE FIRM GO TO THE OLD 6 FIRST VIDS.THE ACTUAL DVD OF THE FIRM DO NOT DESERVE YOU SPEND YOUR MONEY. ANYWAY I PREFER CATHE.I HATE THE MUSIC OF THE OLD 6 FIRM VIDS.IT IS HORRIBLE.