Balance: We stood on one food and Brad tried to knock us over. I had terrible balance with and without the bracelet. Anna was rock steady both ways. The bracelet didn't do much this round.
Flexibility: We had to stretch around as far as we could. Both of us turned further the second time but I think I had just stretched out from the first time.
Strength: We had to press our thumb and middle finger together while Brad tried to pry them apart. I'm not very strong with or without the bracelet, but Anna was a warrior and Brad couldn't pry her fingers apart while she had then bracelet on.
The Power Balance is a neat concept, but I'm still quite skeptical about the actual merit of this product. It costs $39.99, so you'd better be sure you of it before you buy it. It comes in all colours, and seems quite durable, but it seems like a bit of a gimmick. Maybe it enhances your abilities, but for me, I'm going to drop it.