We learn all about lasers , skin and everything what we need about to work in esthetician laser field. It was so knowledgeable and helpful to understand how the lasers work. All the instructors great and so helpful ! I am gratitude all of them and I am very appreciated Kelly , Shelly , Kristin and Ronnie. They are very much pay attention to each laser procedure to explain everything from A to Z , and teaching us all the treatments tricks and issues !