Love the simplicity of this and looks great in our kitchen.  Such a great space saver as we had these bottles on our dining table before and corked wine should be stored horizontal.  Only a 2 screw installation.  One thing I noticed is to remove and place wine, the bottle next to it will have to move a bit to allow enough room for insertion of wine.  I don't really mind this as it allows for more wine to be stored as we have limited vertical wall space!!