Reliability of CD-RW Discs

Fruck asks: "I've been using CD-RW discs to store my important data for the last year, with no problems. However, I fear that one day, somehow the data could be gone because of general wear and tear on the disk. I'm wondering if anyone else who uses CD-RW heavily has experienced any problems with data loss... " Interesting question. Wonder which one fares better: CD-Rs or CD-RWs?