It took a little time to get the hang of it (since the Help is pretty light), but once I did, I love it so much that I have reprogrammed my extra mouse buttons to use the pager and 'assign windows to desktops' (the benefit of having a 6 button mouse). I like this better than YouControl, and didn't try CodeTek, which this is definitely cheaper than.
A few suggestions:
1) Change the app/window assignment sheet (OPT-CMD-O) to a floater that appears under the mouse, like the pager can.
2) Block key commands from going to other windows (Safari goes nuts when I press and hold OPT-tab)
3) Add menu item to assign current app/window to other desktop.

All in all, this app rocks!