I got the Anker vertical wireless mouse a month ago and like it. More comfortable than a standard mouse once you get used to it. My only complaint is the actuation force of the buttons. I don't think it takes any more force for the Anker buttons than a standard mouse, but the mouse tends to move to the left when pushing the buttons. A standard mouse just gets pushed into the pad. I find this annoying when trying to use the middle mouse button to accept or close a window in Creo. The mouse moves when pushing the button and does not accept/close. You have to learn to push back with your thumb to counteract the button push. Maybe the Evoluent vertical mouse has less actuation force for the buttons and does not have this issue. Otherwise, the Anker mouse is great for $24.