Many of the slow watering hoses on here are weeping style.  That is, the hoses are porous and the water dribbles out.  This gives you slow watering bu only where the hose is laying.  I have hard soil and my thought was as the ground saturated, the run off would move down the slight slope and water the rest of the grass slowly.  However, because the sod had very little root  system this was not effective.  It needs to be watered top down.  This hose is exactly right for that