We got this shelf unit to put into a small storage room off the rec room bar that will at times serve as a pantry.  It was easy enough to put together.  Light enough to carry it assembled into place.  We placed the bottom shelf high enough that we can put our Roomba under it and it can leave and return its base without hindrance.  The unit does not come with brackets to secure it to the wall.  Since it is lightweight, we decided it would be smart to do so ... a couple of screws with washers did the trick.