I love the look of this diffuser. It is simple and elegant while being easy to use. I really appreciated the sample oil blend that came with the machine. It is invigorating and quite lovely. 
While I was not impressed with the directions, figuring the machine out was quite easy. Simply fill it with water, add your oil, set your setting buttons which are located on the bottom of the unit and place the ceramic cover on top. The machine will run continuously until it is out of water.