Option+'s UI in my opinion is better than Option. One confusing thing is when trying to modify an existing keyboard shortcut assigned to a mouse button, one have to click the "X" button to the right of the input box to delete the existing shortcut, THEN input the new intended input; if the existing shortcut is not cleared, the new shortcut simply will not be recorded. Another dealbreaker for me is how assigned modifier keys still don't work in Figma; this happens to me with both Logi Option and Option+. My device is MX Master 3 and I use Option/Option+ on a Macbook Pro. I assigned Option to the "forward" key and Cmd to the "back" key below the horizontal scroll wheel. None of these two assignments work as expected in Figma, which is the primary application I work with on a daily basis. If I select an object in Figma on the canvas, hold down Option on my keyboard and simultaneously click then hold left mouse button (i.e. perform a drag action), a copy of the selected object would be made. However when I hold down the mouse key with Option key assigned to it, no copy of the object would be made in Figma, only the original object would be dragged away.