There isnt much noise at all. I also attacehed the Teflon pads that were included but you really dont need to if you dont want to. I am worried about the glass too but it really isn't a huge concern of mine.
When you pick up the mouse and set it back down, there is obviously going to be more noise than a fabric pad but on par with a desk. I know forever I just used my desk as a mouse pad. I wouldn't worry about it much at all.
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