I bought this after seeing a fellow member at my camera club demonstrating cleaning his sensor. Apart from getting a free sensor clean at photography shows, it's normally about £40 per clean at a camera store. Easy to use, magnifier with the LED lighting really helps, you can see any spot of dust or debris and simply hold the camera body upside down and use the blower to remove the dust. If further cleaning is required the carbon tipped pen works a treat. So much so that I bought a larger Lenspen for cleaning my lenses.