I was not sure if this would be a functional thing to have at first. After trying for five minutes, I felt that it is useful since I scroll paged and windows all day long.

I would recommend trying it to see if it's useful for anyone who scrolls through window after windows.

The options keys make scrolling faster than just using the scrolling ball alone.

The only complain is, the scrolling has a minor hiccups when scrolling as well as scrolling not working on some program widows. Whenever that happens, I click on the manual scroll bar and activate the scrolling which isn't a big problem. As for the hiccups, it could be related to the video card or the processor.

Overall, it's a keeper. Hopefully the developer continues to refine it.