This card was an awesome addition to my D-SLR. I have dual card slots and write my jpegs to this card and have it set to upload automatically to my computer. It is an integral part of my image back-up plan. The interface is clear and user friendly and the card is truly plug and play. I had no compatibility problems or snafus to work around. The direct connection functionality is awesome as I'm always afraid of losing images while away on vacation where I tend to shoot a lot. Especially in places with little WiFi infrastructure to jump aboard (e.g. Cuba). The direct connect function allows backup to extra storage on a wireless laptop, or, hopefully and iPad soon! In a pinch even my phone can do back-up duty!
he only negative I can comment on is that you should be prepared for extra battery usage on your camera during the transfers, so consider purchasing an extra battery so you're always charged.
When I showed my wife what this card could do, she insisted on one for her camera too. She got and Explore X2 card as she doesn't shoot RAW images. Kudos Eye-Fi!