Although this is quite logical, it is a bit annoying, both the camera in which the card is swiped the iPod to which the photos are sent quickly lose autonomy. Moreover it heats. Nevertheless, this remains EyeFi a great product. We dream more opportunities (albums, copy, automatic sharing ...) but iOS being what it is the possibilities are more limited. By cons, a real protection would be to copy the pictures in wifi BEFORE you copy them to the memory card part. If the writing of the memory card is corrupted, the photo sent wifi will be. But not on the EyeFi would be compatible with as many cameras as it is now.