Bests & Worsts Reviews from Amazon

I took about 3000 pictures with a Nikon D5200 using this card, enough to to fill it several times. I learned a lot about the card: - The card will only "upload" an image ONCE. So if you view the image on an iPhone or tablet, it won't upload later to your laptop. - Direct mode makes an attempt every time the camera is powered "on". Don't turn your camera off between shots, otherwise direct mode will attempt upon every power-on. - You can't preview images over iPhone or tablet. The entire image will transfer. So make sure your device has plenty of storage space. The Nikon D5200 images (JPG) can be 10MB each. RAW images are much larger. These findings resulted in many negative usability attributes: - The card depletes the battery faster than a normal memory card. - If direct mode is enabled, the battery life is tremendously reduced. This can be somewhat relieved if you don't turn the camera off between shots. But then your battery life is reduced because the camera is always on. - The card seized several times and the Nikon refused to take pictures unless the memory card was removed and re-inserted. - Several pictures were intact but with corrupt EXIF information that prevented the pictures from post-processing (for example, with DxO). - Viewing the pictures with an iPhone made them inaccessible with my laptop later (pictures can only be accessed once with the Eye-Fi). - The included Eye-Fi software (for Windows) is clunky and was not feasible to integrate into my workflow. - Online storage is expensive. The only useful application of this card is if you are a photographer that needs to immediately display or email your shots to clients. If you don't have this requirement, then this card is not for you. UPDATE: I kept the card a bit longer to verify my conclusions. My conclusions were not changed, so I went to Amazon for a return. I missed the return window by 1 day. So now this card is costing me more. Recommend "do not buy" unless you work in a studio where clients need instant viewing of photos.