This looks neat. Anyone tried it yet?

The video reference is not at all useful. That lady just kept talking, she didn't even have a laptop hooked up for demonstration.

It's a cool idea, I just wonder if it's comfortable to use.

I don't expect it to be as comfortable as a full-sized bluetooth mouse, but it's absurdly hard to FIND a full-sized bluetooth mouse! They're all "travel sized", which might be okay for your kid sister, but those of us who wear size 13 shoes just end up with thumb cramps.

However, from an industrial design perspective, it's phenomenally cool, and for $20, I'm in for one. Just to have. Maybe I'll use it, maybe I'll just admire it.