ok, I tried it too, by default it behaves like I needed.
But it seems to me a bit complex, especially in the management of shortcuts.
Specifically, I could not use as the only activator key the meta button (or "win", s- in ratpoison), and even two keys like alt + control.
Another slight downside is the lack of a simple method to display the list of open windows (c-t w is not interactive and the /usr/share/doc/ratpoison/examples/rpshowall.sh script it was not very clear), in short I miss a windows list style alt+tab.
Am listening to some alternative, in the meantime I could take a good look to ratpoison