Like I said, using the Eye fi to transfer from the camera to the Ipad doesn't work. It should, as the Ipad is fully compatible to the Pentax RAW file format (PEF). Using the Apple Connector Kit, it does. So, it's not a problem with the Ipad, it's the way the app saves the files. If you try to transfer them from the ipad to the computer, that doesn't work either. All you get is a broken Tif file that won't open.
It works wonderfully with Jpeg so I might, just might, go get the cheaper version (great fun at weddings) but, to call the card "Pro" !!!! A waste of money.
So, to the gentlemen at Eye fi. Make this product worthy of the name "pro" and make it work with "professional" photographer and not against them. The whole idea of this card, which I might add, is a very good one, is to make things easier. It's a software problem. Your software. Get it sorted. Please.