Bought 2 of these for our living room.  Assembly wasn’t too bad.  4 stars only because each unit was missing a bolt, but we made it work with some other random ones we had kicking around.  These sit with the front feet on an area rug and the back legs on plank flooring, so they lean back very slightly.  They’re sturdy enough this way so we didn’t bother attaching them to the wall.  That said, our son is old enough to resist climbing.