The obvious advantage of this flash is its excellent value for money. Craftsmanship and compatibility with the Sony Alpha 33 case in this instance. Of course, the manufacturer cheat a little on the guide number is not as high but still advertised performance is to live up to expectation. Certain advantage, the power of the flash can use a diffuser device for obtaining a soft light ... and without shadows. A product recommended, especially with the express-delivery chrono Amazon .. still surprising. PR