Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not standard

Although the card itself is not bad technology, it is NOT the standard (which is compact flash, CF). If you ever upgrade to a better camera or another device that uses memory cards (MP3 players, or SLR camera, etc) then you'll lose your investment in these XD cards. Also, since they are proprietary and non standard they cost more per megabyte. I would never purchase a camera that uses non standard proprietary cards (like Sony, which uses their own "memory sticks" or Fuji and the XD cards). But if you already bought a camera which requires them, then you really have no choice. Standards are important with new technology (remember betamax vs. VHS) so that early adopters don't have equipment that becomes obsolete, or unduly pricey due to lack of competition.If you have a choice, try to buy devices that use CF (compact flash) and protect your investment. Just my two cents.