I saw these at a store today and did a double take. I've never heard of shredding scissors but I think they're a great idea. Many of my clients stockpile their shredding until it gets to be a huge pile that they then don't have time to shred. Even when I get them to station the shredder right where they sort mail and paper, they still don't use it all the time. In fact, a lot of them would just as soon tear up paper than feed it through the shredder.
I'm going to start recommending these shears. I can see one really helpful application for them and that's to shred just the personal information on a piece of paper, or the address label on a magazine. Credit card applications, for example, don't need to be completely shredded. You just need to get rid of the identifying information by using the scissors to snip up that little section.
These shears do straight cut only, so they aren't as good for entire sheet shredding as cross-cut shredders because theoretically the strips can be reassembled. However, if you're trying to make some paper fringe to decorate your tiki hut or sushi plate, that feature comes in handy!