Cylindrical Mouse

I never had a problem with the old puck mouse. I never look at a mouse and my hand just orients to the way the cursor moves. Depending on where I'm sitting and what mouse I'm using I hold the mouse at a different angle, but never have any trouble knowing which way is "up".

Like many things using a mouse should become second nature after a while. You don't think about walking and you shouldn't need to think about using a mouse.

It's kind of like driving different cars, even when driving a totally new car I don't need to think about gear selection. It just happens because I'm so used to driving.

well my mouse has 5 customizable buttons on it that I would miss very much, so I wouldn't buy this

While I have wondered about vertical or semi-vertical hand orientations on mice before (fully flat hurts me after a while), this looks too small for the hand in the photo, and I hope they came up with a mechanism to improve upon the aforementioned horrid Apple puck mouse's "which way is up?" problem. Maybe the next iteration.

That looks like a nightmare.

like the original iMac's puck mouse you will end up holding this at an angle, making the pointer to stray...