I have the Eye-Fi card to wirelessly send bought during a photo shoot the same photos on my iPad. The setup of the board is really easy. One need only install the app, connect to the wireless network and enter the code. Takes less than 2 min. In the studio, a few tests have worked quite well, so I took the card to shoot. The shoot itself was unfortunately your disillusionment! Although the iPad was only 1-3 meters away from the camera is interrupted connection periodically. Sometimes the images were quite fast (5-10 sec), sometimes it took forever (2-3 min). It has hampered me literally at work, because I constantly the WLAN and the app had to restart. Then the iPad has again found no WLAN. Especially when the camera is in the sleep mode is the connection establishment thereafter automatically. Finally, the card has stopped completely after 50 transferred photos to work !! I have the card sent back because nothing went! I am again switched to laptop with cable connection, although the wireless version with iPad would have been nicer.
Conclusion: if you want to send a few pictures to your home or to Facebook from vacation (with smartphones and app) extends the card completely. However, for more demanding applications, it is very unreliable!
