Excellent product.  Written assembly instructions are a little vague.  The most important thing to know is DO NOT REMOVE the screw that is already attached to the base support pole.  That is there to guide you during placement of the base securing screw.  The additional screw in the parts bag is just an extra part.  I found that holding the support pole between my knees and resting the base plate on my lap was the easiest way to mount the base.  It's an excellent low profile lamp that provides plenty of light.  We LOVE it.