This is our most recent Smart Media card and we have had no compatibility issues with it. We've been using the card for a year now with no problems in the following devices: Toshiba PDR-M60 digital cam, Lexar card reader, Dazzle card reader. The 64MB card holds something like 200 pictures at the highest quality in our 2 megapixel camera, so we have been more than satisified. If you've got a 3 megapixel or higher digital camera or you're using it to store tunes, I recommend jumping up to the 128MB Viking card. These are great cards at very reasonable prices.