The Silk brand Flash N Go hair remover has unpredictable results. This unit might be very effective on some users and not as effective on others. If the results were 100% then this unit would be like gold. Unfortunately that is not the case. It can become very time consuming when trying to eliminate the hair on large areas of the body. This is a fairly painless unit that comes with refillable pulse cartrages. The lightweight wand plugs in and with the touch of a button sends a pulse that is designed to eliminate hair from regrowth. I personally found that this was not as I had imagined it would work. I still have hair in severplaces on my body that I had used this unit on and frankly became board with how long it was taking to get results. This retails for $200.