I got my Sizzix quite some time ago. I stocked up on these pads whenever they went on sale. I've cut countless thing on the same pad. The pad looks ugly now; it's got cuts all in it and they're so superimposed over each other that you can't even tell what I ever cut on the thing. However, it keeps on working. I've had no problems. It's durable and lasts what feels like forever!
If you have the original sizzix then you know it is not easy to find dies and cutting pads locally, but this was less expensive (including shipping) than the one I purchased on the sizzix site! How crazy is that?