Did you do the whole large square, or just the small sq?
I have been in some goalmouths where just the 6 is done and you get a kind of shelf, which can lead to some tricky bounces etc....
I have been keen to get this done in my club, however the "traditionalists" are dead set against it.
The goals get wrecked, not by the actual games etc, but its the puck/kick arounds etc that go on all weekend. Youngsters shuffling around in runners rubbing away at the surface.