I've tried it just now, and found it can be very good. By removing the scroll bars, we get more screen space, and the program works in a similar way as adobe's acrobat, which i find very intuitive (grab and drag the page itself). This can also be inverted, and it works just like the scrollbars do.
Now, for the bad part: i can't use the right mouse button, that would interfeer with opera's mouse gestures (NOT GOOD!
). And if i select the left mouse button as trigger, i won't be able to select text to copy and such without pressing the disable key. So, i think this program misses one small feature: an activation area. It'd be very useful if i was able to have it scroll the windows only when the mouse was on the right 10% of the window or such.