I went with this one instead of the logitech one, even though Logitech's seemed more ergonomic. But since this one was around 1/3 to 1/4 of the price when I bought it compared to Logitech's offering Buttons: (tested on a Windows 11 machine) The Top Oval Button: It was weird... when I pressed it with no presentation open, it reorganized all of my desktop shortcuts so dont press that if you're not in a ppt
The forward and back is pretty straight forward and it just registered as space bar and left arrow
the laser button activates the red pointer
This would get 5 stars if the laser button was at the top, as it would give us more control over the entire device and also be better hidden in our hands since that's used more than the button with the oval symbol on it