It does enable the feature  and the window flows effortlessly  but resizing is very difficult. Wish there was a dedicated resizing  from fullscreen  to floating. It is another launcher per-se. If you don't have adb installed on a PC  or can't fathom how to use the native way to have floating windows  this works. Would have been nice to have just the floating part  without the launcher. I did the adb way eventually  should make this  without the launcher part  android has too many ways to do launcher. The native way is more smooth in the resizing aspect  but your app floats windows just fine.
March 29 2017