Memory cards are just memory cards, right?
Well, that's usually true: you stick them in the camera and they work. So why buy this?
The first thing I noticed with this new card is how quickly I can delete all the files on my Canon 400D: just a couple of seconds. It works well on continuous shooting, as you'd expect, but more noticable is how fast it is when in my card reader. I can access photos from the card reader almost like they were on the hard disk.
And of course, being Sandisk, you can trust that it'll keep on working. I have several cameras, all with Sandisk cards and they've never let me down.