I'm thinking of getting my wife an Eye-Fi Explorer x2 card for an anniversary present -- she's gotten into photography as a hobby. I like the idea that it will automatically upload photos to her computer when nearby. And it has some sort of geotagging feature, that could be fun. But I don't know much about these cards, and they're very expensive compared to a normal SD card. Do they work well? Is the wifi-based location system robust? Thanks for any insights.