I know this product is not new but I recently got a hold of an Ultra II SD Plus to test out on my camera(s) and Treo 680 and I am really in love with this. So much that moving forward, I will only be purchasing SD Plus series. The concept is quite simple, an SD Card that can be fold in to reveal an USB connector so you can practically upload or download its content on any computer with a spare USB port.
Its so easy to use, you don't even need to read the instructions. Simply open the card up, format it in your device and start using it. Once you've collected content (ie. music, photos, docs), push on the side of the card so it hinges backwards to expose the USB connector. Plug and play.
The Ultra II is just as fast as any of my previously owned SanDisk Ultra SD II cards, only this model has the added convenience of being able to transfer its content pratically anywhere. As mentioned before, I will only be buying the Ultra II SD Plus moving forward as it provides the type of mobile experience I am looking for!