The card reader can be used to import media files directly into your iPad, without the need to sync to iTunes.
Extremely handy! Quick! Usable "on-the-go". Great for travel.
There are a few details you need to know to import media files this way.
1). Create a folder on any SD card and name that folder "DCIM".
2). Place media files into the DCIM folder.
3). Important: The media file names have to be exactly 8 characters long (no more, no less), or the iPad will not see them.
Examples: 8letters.mp3, 8numbers.jpg, 8Numbers.mp4, TheBirds.mp4, Img_9001.bmp.
Those are really the main details, but here are a few more:
When you insert the Card Reader (one of two devices in the kit) into the iPad, with an SD card in it, in a moment the iPad screen will show thumbnails of all the media files on the card.
You can import some or all into the iPad. You cannot play media files from the card, you must first import them. To select some media files, just touch them to highlight them and choose "Import". Or, you can select "Import All".
The iPad will ask if you want to Keep or Delete (on the card). Be careful to select Keep (in most cases).
Valid video files need to be in the ".MP4" format, version H.264. Or convert them to that format using almost any conversion program. I chose a size of 640 x 480, and it was perfect for filling up the screen.
NOTE: the media files are imported into the "Photo" section of your iPad. Even the MP3's and Videos. So, to watch a movie, for example, select the Photo icon, not the Video icon on your screen (it won't be in the Video section).
AND, you can delete any media files after playing them. That way, you can, for example, load a movie or two into the iPad, watch, then delete to make room for others.
You can carry an unlimited amount of media files with you, perhaps on a trip. Why not 100 GB or more? Fantastic!
ONE MORE THING [N.B.]:
When I first tried to import the media files, I knew about the DCIM folder (it's the same as your camera would create), but the 8 character requirement I hadn't known. Only one media file showed up.
So I called Apple and spoke to a senior support staff member. I was repeatedly LIED TO. Repeatedly. Which I found infuriating. Apple, or any company, is not required to give me information just because I want it. But lying about it is NOT appropriate.
One of the reasons for their "misstatements" likely is that prospective iPad buyers might not opt for the larger capacity iPads if they knew this information. New iPads like the iPad 2 charge a large premium for the extra memory, and it's very, very profitable for Apple. So be it. But Apple, don't instruct your employees to lie about it, and give them prepared scripts to mislead customers. Harrumph!!!
Remember, there is nothing magical about how your camera puts files on an SD card. The Camera Connection Kit Card Reader doesn't know the difference (there isn't one) and does not care, so long as it meets the requirements listed above.