Well, worth is very much in the eye of the beholder. That said, I've been a CC Member for a year and a half now, and not regretted it once. Mind, IIRC the idea behind CC membership is the discounts on their normal products, with the IoTM stuff being Icing on the cake as it were. Though I'm sure I'm not the only one that gets more items then savings out of it.
-Falcus