This product is so easy to install!! There are no batteries needed, or wires, as it is all solar powered. And yes, it works great! Super bright with wide coverage! 
There are two lights and one solar panel. You just put it where you need the  extra light. I put mine on the house above the back deck. The light also covers some of the back yard area. It has a motion sensor so it does come on when there is  motion in the 600 square foot coverage area. Charges it’s solar power source during the day by the sun. 
Super easy and effective! Highly recommend!